{"item": {"cve_id": "CVE-2021-40444", "ghsa_id": "", "osv_id": "", "title": "Microsoft MSHTML Remote Code Execution Vulnerability", "description": "Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.\nAn attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.\nMicrosoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.\nUpon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.\nPlease see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability.\nUPDATE September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.", "published_at": "2021-09-15T12:15:16.467", "modified_at": "2026-08-10T20:19:30.393", "vendor": "Microsoft", "product": "Windows 10 1507", "affected_versions": ["10.0.10240.0", "10.0.14393.0", "10.0.17763.0", "10.0.0", "6.1.0", "6.3.0", "6.1.7601.0", "6.0.6003.0", "6.2.9200.0", "6.3.9600.0", "10.0.20348.0"], "fixed_versions": [], "cvss_score": 8.8, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L", "severity": "HIGH", "epss_score": 0.9745, "epss_percentile": 0.999, "epss_date": "2026-10-07", "is_kev": true, "kev_date": "2021-11-03", "kev_due_date": "2021-11-17", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-22"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "REQUIRED", "references": ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444", "http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html", "http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html", "http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html", "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2021-40444", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2021-40444", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2021-40444"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444", "tags": ["Patch", "Vendor Advisory", "vendor-advisory", "patch"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html", "tags": ["Third Party Advisory", "VDB Entry", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444", "tags": ["Mitigation", "Patch", "Vendor Advisory", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444", "tags": ["US Government Resource", "government-resource"], "source": "NVD", "name": ""}], "cvss_v4_score": null, "cvss_v4_vector": "", "cvss_v4_severity": "", "nvd_status": "Analyzed", "cna": "microsoft", "date_reserved": "2021-09-02T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "no", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2021-09-08T00:00:00+00:00", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Microsoft", "product": "Windows 10 1507", "ranges": ["avant 10.0.10240.19060"], "first_unaffected": ["10.0.10240.19060"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1607", "ranges": ["avant 10.0.14393.4651"], "first_unaffected": ["10.0.14393.4651"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1809", "ranges": ["avant 10.0.17763.2183"], "first_unaffected": ["10.0.17763.2183"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1909", "ranges": ["avant 10.0.18363.1801"], "first_unaffected": ["10.0.18363.1801"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 2004", "ranges": ["avant 10.0.19041.1237"], "first_unaffected": ["10.0.19041.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 20h2", "ranges": ["avant 10.0.19042.1237"], "first_unaffected": ["10.0.19042.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 21h1", "ranges": ["avant 10.0.19043.1237"], "first_unaffected": ["10.0.19043.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 7", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 8.1", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Rt 8.1", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2004", "ranges": ["avant 10.0.19041.1237"], "first_unaffected": ["10.0.19041.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2008", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2012", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2016", "ranges": ["avant 10.0.14393.4651"], "first_unaffected": ["10.0.14393.4651"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2019", "ranges": ["avant 10.0.17763.2183"], "first_unaffected": ["10.0.17763.2183"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1507", "ranges": ["de 10.0.10240.0 à 10.0.10240.19060 (exclue)"], "first_unaffected": ["10.0.10240.19060"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1607", "ranges": ["de 10.0.14393.0 à 10.0.14393.4651 (exclue)"], "first_unaffected": ["10.0.14393.4651"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "ranges": ["de 10.0.17763.0 à 10.0.17763.2183 (exclue)"], "first_unaffected": ["10.0.17763.2183"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "ranges": ["de 10.0.0 à 10.0.17763.2183 (exclue)"], "first_unaffected": ["10.0.17763.2183"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1909", "ranges": ["de 10.0.0 à 10.0.18363.1801 (exclue)"], "first_unaffected": ["10.0.18363.1801"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 2004", "ranges": ["de 10.0.0 à 10.0.19041.1237 (exclue)"], "first_unaffected": ["10.0.19041.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 20H2", "ranges": ["de 10.0.0 à 10.0.19042.1237 (exclue)"], "first_unaffected": ["10.0.19042.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 21H1", "ranges": ["de 10.0.0 à 10.0.19043.1237 (exclue)"], "first_unaffected": ["10.0.19043.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 7 Service Pack 1", "ranges": ["de 6.1.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 R2 Service Pack 1", "ranges": ["de 6.1.7601.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)", "ranges": ["de 6.1.7601.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 Service Pack 2", "ranges": ["de 6.0.6003.0 à 6.0.6003.21218 (exclue)"], "first_unaffected": ["6.0.6003.21218"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 Service Pack 2 (Server Core installation)", "ranges": ["de 6.0.6003.0 à 6.0.6003.21218 (exclue)"], "first_unaffected": ["6.0.6003.21218"], "source": "CVE.org"}], "kev_name": "Microsoft MSHTML Remote Code Execution Vulnerability", "kev_short_description": "Microsoft MSHTML contains a unspecified vulnerability that allows for remote code execution.", "kev_ransomware": "Known", "kev_notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-40444", "kev_cwes": ["CWE-22"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 78, "risk_class": "Critique", "impact": {"confidentialite": "limité", "integrite": "élevé", "disponibilite": "limité", "summary": "Un attaquant exploitant cette vulnérabilité pourrait, selon les conditions décrites par les sources, exploitable à distance (réseau), sans authentification préalable, requiert une interaction de l'utilisateur, affecter la confidentialité des données, l'intégrité du système et la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Traversée de répertoire : un chemin mal contrôlé peut viser des fichiers hors du dossier prévu.", "mitigation": {"correction": {"available": true, "text": "Mettre à jour : selon les sources, ne sont plus concernées les versions à partir de Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183, Windows 10 1909 10.0.18363.1801, Windows 10 2004 10.0.19041.1237."}, "mitigation": {"specific": "Aucune mesure de mitigation spécifique confirmée par les sources consultées. Consultez les références officielles pour d'éventuelles mesures détaillées.", "general": ["Maintenir le produit à jour et activer les mises à jour de sécurité.", "Restreindre l'exposition réseau du service au strict nécessaire.", "Appliquer le principe du moindre privilège.", "Surveiller les journaux et les alertes de sécurité."], "specific_links": []}, "containment": {"applicable": true, "actions": ["Action recommandée par la CISA : Apply updates per vendor instructions.", "Isoler ou restreindre l'accès au service concerné.", "Restreindre les flux réseau entrants/sortants liés au composant.", "Renforcer la surveillance des journaux et des accès.", "Désactiver temporairement le composant vulnérable si l'activité le permet."]}, "note": "Priorité aux consignes officielles de l'éditeur et des références. Vérifiez toujours l'avis de sécurité avant toute intervention en production.", "official_links": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444", "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées", "editeur": "Microsoft", "domaine": "msrc.microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444", "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées", "editeur": "Microsoft", "domaine": "portal.msrc.microsoft.com"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Un attaquant peut lire des fichiers qui devraient rester inaccessibles, à distance et sans compte", "headline_is_derived": true, "action": "Mettre à jour vers Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183 ou plus récent, version publiée comme non concernée.", "action_kind": "update", "concerned": [{"version": "Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183 ou plus récent", "state": "safe", "state_label": "Non concerné", "todo": "Rien à faire. Gardez les mises à jour automatiques activées."}, {"version": "10.0.10240.0, 10.0.14393.0, 10.0.17763.0, 10.0.0", "state": "hit", "state_label": "Concerné", "todo": "Mettre à jour vers Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183 ou plus récent, version publiée comme non concernée."}, {"version": "Je ne connais pas ma version", "state": "unknown", "state_label": "À vérifier", "todo": "La version s'affiche généralement dans le menu « À propos » ou « Aide » du logiciel."}], "steps": [{"title": "Sauvegarder avant d'intervenir", "detail": "Une copie récente des données et de la configuration. Si votre hébergeur propose une sauvegarde en un clic, c'est le moment.", "duration": "10 min", "priority": false}, {"title": "Mettre à jour vers Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183 ou plus récent, version publiée comme non concernée", "detail": "C'est la correction officielle. Tant qu'elle n'est pas appliquée, les autres mesures ne sont que temporaires.", "duration": "15 à 45 min", "priority": true}, {"title": "En attendant : réduire l'exposition sur Internet", "detail": "La faille est exploitable à distance. Limiter l'accès au service depuis l'extérieur (pare-feu, filtrage d'adresses, VPN) réduit fortement le risque.", "duration": "30 min", "priority": false}, {"title": "Vérifier que vous n'avez pas déjà été touché", "detail": "Cette faille est activement exploitée. Contrôler les comptes créés récemment, les connexions inhabituelles et les fichiers modifiés depuis la date de publication.", "duration": "30 min", "priority": true}, {"title": "Confirmer que tout fonctionne encore", "detail": "Après correction : page d'accueil, connexion, et les deux ou trois fonctions dont vous vous servez tous les jours.", "duration": "10 min", "priority": false}], "exploited": true, "exploited_label": "Oui, des attaques réelles sont constatées", "fixed_label": "Windows 10 1507 10.0.10240.19060, Windows 10 1607 10.0.14393.4651, Windows 10 1809 10.0.17763.2183 (non concernée selon les sources)", "affected_label": "10.0.10240.0, 10.0.14393.0, 10.0.17763.0, 10.0.0"}, "severity_display": "Élevée", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2021-40444", "severity_fr": "Élevée", "epss_pct": 97.5, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2021-09-15", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40444"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2021-09-15", "url": "https://www.cve.org/CVERecord?id=CVE-2021-40444"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2021-11-03", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444"}, {"source": "FIRST EPSS", "label": "FIRST EPSS", "date_label": "Score daté du", "date": "2026-10-07", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-40444"}], "exploit_public": true, "reseau_sans_auth": false, "exposition": "À distance, sous conditions (compte ou action d'un utilisateur)", "owasp": [{"code": "A01", "nom": "Contrôle d'accès défaillant", "nom_officiel": "Broken Access Control", "slug": "a01-controle-d-acces-defaillant", "libelle": "A01:2025 Contrôle d'accès défaillant", "url_officielle": "https://top10.owasp.org/2025/A01_2025-Broken_Access_Control/"}]}, "presentation": {"en_bref": [{"question": "Est-elle attaquée ?", "ton": "alerte", "reponse": "Oui, attaques constatées", "source": "Catalogue CISA KEV"}, {"question": "Existe-t-il un correctif ?", "ton": "bon", "reponse": "Oui : 10.0.10240.19060, 10.0.14393.4651, 10.0.17763.2183, 10.0.18363.1801…", "source": "Versions publiées comme non concernées"}, {"question": "Comment l'attaquer ?", "ton": "neutre", "reponse": "À distance, sous conditions (compte ou action d'un utilisateur)", "source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "alerte", "reponse": "97,5 % sur 30 jours", "source": "Plus probable que 100 % des failles connues"}], "references": [{"cle": "correctif", "titre": "Correctifs et versions corrigées", "explication": "Les pages que les sources désignent comme correctif ou notes de version.", "items": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444", "domaine": "msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444", "domaine": "portal.msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Mesure de contournement", "Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}]}, {"cle": "avis_tiers", "titre": "Avis d'autorités et d'organismes tiers", "explication": "CERT, agences gouvernementales, bases de vulnérabilités, chercheurs.", "items": [{"url": "http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": false}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444", "domaine": "www.cisa.gov", "editeur": "CISA", "etiquettes": ["Ressource gouvernementale américaine", "Ressource gouvernementale"], "nom": "", "lien": true, "casse": false}]}, {"cle": "exploit", "titre": "Codes d'exploitation référencés", "explication": "Les sources signalent un code d'exploitation public. Par prudence, CyberAlert affiche le site qui l'héberge sans lien direct : l'information utile ici est son existence, qui rend la faille plus facile à attaquer.", "items": [{"url": "http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}, {"url": "http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}]}], "liens_correction": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444", "domaine": "msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444", "domaine": "portal.msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Mesure de contournement", "Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées"}], "nb_exploits": 2, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L", "metriques": [{"code": "AV", "nom": "Vecteur d'attaque", "valeur": "Réseau (à distance, y compris par Internet)", "brut": "N", "explication": "D'où l'attaquant doit agir."}, {"code": "AC", "nom": "Complexité de l'attaque", "valeur": "Faible", "brut": "L", "explication": "Conditions hors du contrôle de l'attaquant."}, {"code": "PR", "nom": "Privilèges requis", "valeur": "Aucun (pas de compte)", "brut": "N", "explication": "Droits dont l'attaquant a besoin avant d'attaquer."}, {"code": "UI", "nom": "Interaction de l'utilisateur", "valeur": "Requise", "brut": "R", "explication": "Une victime doit-elle cliquer ou ouvrir quelque chose ?"}, {"code": "S", "nom": "Portée", "valeur": "Modifiée (d'autres composants peuvent être touchés)", "brut": "C", "explication": "L'attaque peut-elle toucher d'autres composants que celui qui est vulnérable ?"}, {"code": "C", "nom": "Confidentialité", "valeur": "Faible", "brut": "L", "explication": "Accès à des informations protégées."}, {"code": "I", "nom": "Intégrité", "valeur": "Élevé", "brut": "H", "explication": "Modification de données ou du système."}, {"code": "A", "nom": "Disponibilité", "valeur": "Faible", "brut": "L", "explication": "Arrêt ou ralentissement du service."}], "calculateur": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-22", "nom": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "url": "https://cwe.mitre.org/data/definitions/22.html"}], "owasp": [{"code": "A01", "nom": "Contrôle d'accès défaillant", "nom_officiel": "Broken Access Control", "slug": "a01-controle-d-acces-defaillant", "libelle": "A01:2025 Contrôle d'accès défaillant", "url_officielle": "https://top10.owasp.org/2025/A01_2025-Broken_Access_Control/"}], "ssvc": {"lignes": [{"nom": "Exploitation", "valeur": "Exploitation active constatée", "brut": "active"}, {"nom": "Automatisable", "valeur": "Non : l'attaque ne peut pas être entièrement automatisée", "brut": "no"}, {"nom": "Impact technique", "valeur": "Total : contrôle complet du composant ou de ses informations", "brut": "total"}], "version": "2.0.3", "date": "2021-09-08", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2021-09-02", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2021-09-08", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2021-09-15", "libelle": "Publication de la vulnérabilité", "qui": "microsoft"}, {"date": "2021-11-03", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2021-11-17", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2026-08-10", "libelle": "Dernière mise à jour de la fiche source", "qui": "Source"}, {"date": "2026-10-07", "libelle": "Calcul du score EPSS affiché", "qui": "FIRST"}], "liens_officiels": [{"nom": "NVD (NIST)", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40444", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2021-40444", "description": "Enregistrement officiel publié par l'organisme qui a attribué l'identifiant."}, {"nom": "CISA KEV", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40444", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-40444", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2021-40444", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2021-40444", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Microsoft", "product": "Windows 10 1507", "ranges": ["avant 10.0.10240.19060"], "first_unaffected": ["10.0.10240.19060"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1607", "ranges": ["avant 10.0.14393.4651"], "first_unaffected": ["10.0.14393.4651"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1809", "ranges": ["avant 10.0.17763.2183"], "first_unaffected": ["10.0.17763.2183"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 1909", "ranges": ["avant 10.0.18363.1801"], "first_unaffected": ["10.0.18363.1801"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 2004", "ranges": ["avant 10.0.19041.1237"], "first_unaffected": ["10.0.19041.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 20h2", "ranges": ["avant 10.0.19042.1237"], "first_unaffected": ["10.0.19042.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 21h1", "ranges": ["avant 10.0.19043.1237"], "first_unaffected": ["10.0.19043.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 7", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 8.1", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Rt 8.1", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2004", "ranges": ["avant 10.0.19041.1237"], "first_unaffected": ["10.0.19041.1237"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2008", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2012", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2016", "ranges": ["avant 10.0.14393.4651"], "first_unaffected": ["10.0.14393.4651"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2019", "ranges": ["avant 10.0.17763.2183"], "first_unaffected": ["10.0.17763.2183"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1507", "ranges": ["de 10.0.10240.0 à 10.0.10240.19060 (exclue)"], "first_unaffected": ["10.0.10240.19060"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1607", "ranges": ["de 10.0.14393.0 à 10.0.14393.4651 (exclue)"], "first_unaffected": ["10.0.14393.4651"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "ranges": ["de 10.0.17763.0 à 10.0.17763.2183 (exclue)"], "first_unaffected": ["10.0.17763.2183"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "ranges": ["de 10.0.0 à 10.0.17763.2183 (exclue)"], "first_unaffected": ["10.0.17763.2183"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 1909", "ranges": ["de 10.0.0 à 10.0.18363.1801 (exclue)"], "first_unaffected": ["10.0.18363.1801"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 2004", "ranges": ["de 10.0.0 à 10.0.19041.1237 (exclue)"], "first_unaffected": ["10.0.19041.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 20H2", "ranges": ["de 10.0.0 à 10.0.19042.1237 (exclue)"], "first_unaffected": ["10.0.19042.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 10 Version 21H1", "ranges": ["de 10.0.0 à 10.0.19043.1237 (exclue)"], "first_unaffected": ["10.0.19043.1237"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows 7 Service Pack 1", "ranges": ["de 6.1.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 R2 Service Pack 1", "ranges": ["de 6.1.7601.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)", "ranges": ["de 6.1.7601.0 à 6.1.7601.25712 (exclue)"], "first_unaffected": ["6.1.7601.25712"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 Service Pack 2", "ranges": ["de 6.0.6003.0 à 6.0.6003.21218 (exclue)"], "first_unaffected": ["6.0.6003.21218"], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server 2008 Service Pack 2 (Server Core installation)", "ranges": ["de 6.0.6003.0 à 6.0.6003.21218 (exclue)"], "first_unaffected": ["6.0.6003.21218"], "source": "CVE.org"}], "notes_kev": ["https://nvd.nist.gov/vuln/detail/CVE-2021-40444"]}, "consulted_at": "2026-10-08T07:34:28.095199+00:00"}