{"item": {"cve_id": "CVE-2017-8540", "ghsa_id": "", "osv_id": "", "title": "CVE-2017-8540", "description": "The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to memory corruption. aka \"Microsoft Malware Protection Engine Remote Code Execution Vulnerability\", a different vulnerability than CVE-2017-8538 and CVE-2017-8541.", "published_at": "2017-05-26T20:29:00.427", "modified_at": "2026-06-17T01:26:32.713", "vendor": "Microsoft", "product": "Malware Protection Engine", "affected_versions": ["Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016."], "fixed_versions": [], "cvss_score": 7.8, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "severity": "HIGH", "epss_score": 0.71874, "epss_percentile": 0.99414, "epss_date": "2026-10-07", "is_kev": true, "kev_date": "2022-03-03", "kev_due_date": "2022-03-24", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-787"], "attack_vector": "LOCAL", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "REQUIRED", "references": ["http://www.securityfocus.com/bid/98703", "http://www.securitytracker.com/id/1038571", "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "https://www.exploit-db.com/exploits/42088/", "http://www.securityfocus.com/bid/98703", "http://www.securitytracker.com/id/1038571", "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "https://www.exploit-db.com/exploits/42088/", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2017-8540", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2017-8540", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2017-8540"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "http://www.securityfocus.com/bid/98703", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://www.securitytracker.com/id/1038571", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.exploit-db.com/exploits/42088/", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://www.securityfocus.com/bid/98703", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry", "vdb-entry", "x_refsource_BID", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://www.securitytracker.com/id/1038571", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry", "vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "tags": ["Mitigation", "Patch", "Vendor Advisory", "x_refsource_CONFIRM", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.exploit-db.com/exploits/42088/", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "exploit", "x_refsource_EXPLOIT-DB", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540", "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": "2017-05-03T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "no", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2025-02-10T15:08:46.174343Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Microsoft", "product": "Malware Protection Engine", "ranges": ["de 1.1.13701.0 à 1.1.13704.0 (exclue)"], "first_unaffected": ["1.1.13704.0"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Exchange Server", "ranges": ["2013", "2016"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Forefront Endpoint Protection", "ranges": ["toutes versions (selon NVD)", "2010"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Forefront Security", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Intune Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Security Essentials", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "System Center Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Defender", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft Corporation", "product": "Malware Protection Engine", "ranges": ["Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016."], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability", "kev_short_description": "The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to memory corruption. aka \"Microsoft Malware Protection Engine Remote Code Execution Vulnerability\".", "kev_ransomware": "Unknown", "kev_notes": "https://nvd.nist.gov/vuln/detail/CVE-2017-8540", "kev_cwes": ["CWE-119"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 70, "risk_class": "Critique", "impact": {"confidentialite": "élevé", "integrite": "élevé", "disponibilite": "élevé", "summary": "Un attaquant exploitant cette vulnérabilité pourrait, selon les conditions décrites par les sources, nécessite un accès local, 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": "Écriture hors limites mémoire : l'application écrit au-delà d'une zone prévue, pouvant provoquer un plantage ou un comportement anormal.", "mitigation": {"correction": {"available": true, "text": "Mettre à jour : selon les sources, ne sont plus concernées les versions à partir de Malware Protection Engine 1.1.13704.0."}, "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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "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": "Le logiciel peut écrire hors de la zone mémoire prévue, jusqu'au plantage, depuis l'appareil lui-même", "headline_is_derived": true, "action": "Mettre à jour vers Malware Protection Engine 1.1.13704.0 ou plus récent, version publiée comme non concernée.", "action_kind": "update", "concerned": [{"version": "Malware Protection Engine 1.1.13704.0 ou plus récent", "state": "safe", "state_label": "Non concerné", "todo": "Rien à faire. Gardez les mises à jour automatiques activées."}, {"version": "Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016.", "state": "hit", "state_label": "Concerné", "todo": "Mettre à jour vers Malware Protection Engine 1.1.13704.0 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 Malware Protection Engine 1.1.13704.0 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 : restreindre l'accès à l'appareil", "detail": "L'exploitation demande un accès local à la machine. Limiter qui peut s'y connecter suffit à contenir le risque immédiat.", "duration": "20 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": "Malware Protection Engine 1.1.13704.0 (non concernée selon les sources)", "affected_label": "Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016."}, "severity_display": "Élevée", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2017-8540", "severity_fr": "Élevée", "epss_pct": 71.9, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2017-05-26", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-8540"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2017-05-26", "url": "https://www.cve.org/CVERecord?id=CVE-2017-8540"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2022-03-03", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540"}, {"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-2017-8540"}], "exploit_public": true, "reseau_sans_auth": false, "exposition": "Avec un accès à la machine", "owasp": []}, "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 : 1.1.13704.0", "source": "Versions publiées comme non concernées"}, {"question": "Comment l'attaquer ?", "ton": "neutre", "reponse": "Avec un accès à la machine", "source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "alerte", "reponse": "71,9 % sur 30 jours", "source": "Plus probable que 99 % 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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "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://www.securityfocus.com/bid/98703", "domaine": "www.securityfocus.com", "editeur": "", "etiquettes": ["Lien signalé cassé", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": true}, {"url": "http://www.securitytracker.com/id/1038571", "domaine": "www.securitytracker.com", "editeur": "", "etiquettes": ["Lien signalé cassé", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": true}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540", "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": "https://www.exploit-db.com/exploits/42088/", "domaine": "www.exploit-db.com", "editeur": "Exploit-DB", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}]}], "liens_correction": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540", "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": 1, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "metriques": [{"code": "AV", "nom": "Vecteur d'attaque", "valeur": "Local (accès à la machine)", "brut": "L", "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": "Inchangée", "brut": "U", "explication": "L'attaque peut-elle toucher d'autres composants que celui qui est vulnérable ?"}, {"code": "C", "nom": "Confidentialité", "valeur": "Élevé", "brut": "H", "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": "Élevé", "brut": "H", "explication": "Arrêt ou ralentissement du service."}], "calculateur": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-787", "nom": "Out-of-bounds Write", "url": "https://cwe.mitre.org/data/definitions/787.html"}], "owasp": [], "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": "2025-02-10", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2017-05-03", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2017-05-26", "libelle": "Publication de la vulnérabilité", "qui": "microsoft"}, {"date": "2022-03-03", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2022-03-24", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2025-02-10", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2026-06-17", "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-2017-8540", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2017-8540", "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-2017-8540", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-8540", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2017-8540", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2017-8540", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Microsoft", "product": "Malware Protection Engine", "ranges": ["de 1.1.13701.0 à 1.1.13704.0 (exclue)"], "first_unaffected": ["1.1.13704.0"], "source": "NVD"}, {"vendor": "Microsoft", "product": "Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Exchange Server", "ranges": ["2013", "2016"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Forefront Endpoint Protection", "ranges": ["toutes versions (selon NVD)", "2010"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Forefront Security", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Intune Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Security Essentials", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "System Center Endpoint Protection", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Defender", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft Corporation", "product": "Malware Protection Engine", "ranges": ["Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016."], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://nvd.nist.gov/vuln/detail/CVE-2017-8540"]}, "consulted_at": "2026-10-08T11:51:18.022473+00:00"}