{"item": {"cve_id": "CVE-2014-1776", "ghsa_id": "", "osv_id": "", "title": "CVE-2014-1776", "description": "Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"", "published_at": "2014-04-27T10:55:03.340", "modified_at": "2026-06-17T00:05:32.593", "vendor": "Microsoft", "product": "Internet Explorer", "affected_versions": ["n/a"], "fixed_versions": [], "cvss_score": 9.8, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "severity": "CRITICAL", "epss_score": 0.82682, "epss_percentile": 0.9966, "epss_date": "2026-10-06", "is_kev": true, "kev_date": "2022-01-28", "kev_due_date": "2022-07-28", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-416"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "references": ["http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx", "http://secunia.com/advisories/57908", "http://securitytracker.com/id?1030154", "http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html", "http://www.kb.cert.org/vuls/id/222929", "http://www.osvdb.org/106311", "http://www.securityfocus.com/bid/67075", "http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/", "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021", "https://technet.microsoft.com/library/security/2963983", "http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx", "http://secunia.com/advisories/57908", "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts", "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script", 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"x_refsource_CONFIRM", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script", "tags": ["Third Party Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts", "tags": ["Third Party Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776", "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": "2014-01-29T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "yes", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2025-02-10T19:31:15.775834Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Microsoft", "product": "Internet Explorer", "ranges": ["6", "7", "8", "9", "10", "11"], "first_unaffected": [], "source": "NVD"}, {"vendor": "n/a", "product": "n/a", "ranges": ["n/a"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Microsoft Internet Explorer Memory Corruption Vulnerability", "kev_short_description": "Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.", "kev_ransomware": "Unknown", "kev_notes": "https://learn.microsoft.com/en-us/security-updates/SecurityBulletins/2014/ms14-021?redirectedfrom=MSDN; https://nvd.nist.gov/vuln/detail/CVE-2014-1776", "kev_cwes": ["CWE-416"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 78, "risk_class": "Critique", "impact": {"confidentialite": "élevé", "integrite": "élevé", "disponibilite": "élevé", "summary": "Un attaquant exploitant cette vulnérabilité pourrait, selon les conditions décrites par les sources, exploitable à distance (réseau), sans authentification préalable, affecter la confidentialité des données, l'intégrité du système et la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Utilisation de mémoire après libération (use-after-free) : accès à une zone mémoire déjà libérée, source d'instabilité.", "mitigation": {"correction": {"available": true, "text": "Appliquer le correctif de l'éditeur dès que possible (lien ci-dessous)."}, "mitigation": {"specific": "1 source publie une mesure de contournement étiquetée comme telle : consultez-la avant d'agir, elle fait foi.", "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": ["http://www.kb.cert.org/vuls/id/222929"]}, "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://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021", "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées", "editeur": "", "domaine": "docs.microsoft.com"}, {"url": "https://technet.microsoft.com/library/security/2963983", "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées", "editeur": "", "domaine": "technet.microsoft.com"}, {"url": "http://www.kb.cert.org/vuls/id/222929", "groupe": "contournement", "groupe_titre": "Mesures de contournement", "editeur": "CERT/CC", "domaine": "www.kb.cert.org"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Une zone mémoire déjà libérée peut être réutilisée, avec des effets imprévisibles, à distance et sans compte", "headline_is_derived": true, "action": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur.", "action_kind": "official", "concerned": [{"version": "n/a", "state": "hit", "state_label": "Concerné", "todo": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur."}, {"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": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur", "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": "Correctif non identifié dans les sources", "affected_label": "n/a"}, "severity_display": "Critique", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2014-1776", "severity_fr": "Critique", "epss_pct": 82.7, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2014-04-27", "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-1776"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", 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"source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "alerte", "reponse": "82,7 % 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://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021", "domaine": "docs.microsoft.com", "editeur": "", "etiquettes": ["Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}, {"url": "https://technet.microsoft.com/library/security/2963983", "domaine": "technet.microsoft.com", "editeur": "", "etiquettes": ["Mesure de contournement", "Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}]}, {"cle": "contournement", "titre": "Mesures de contournement", "explication": "Ce qu'on peut faire en attendant le correctif, quand une source en publie.", "items": 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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://www.signalsec.com/cve-2014-1776-ie-0day-analysis/", "domaine": "www.signalsec.com", "editeur": "", "etiquettes": ["Code d'exploitation", "Avis d'un tiers"], "nom": "", "lien": false, "casse": false}]}, {"cle": "autres", "titre": "Autres références", "explication": "Références publiées sans étiquette par les sources : leur nature n'est pas qualifiée.", "items": [{"url": "http://secunia.com/advisories/57908", "domaine": "secunia.com", "editeur": "", "etiquettes": ["Lien signalé cassé"], "nom": "", "lien": true, "casse": true}, {"url": "http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html", "domaine": "www.fireeye.com", "editeur": "", "etiquettes": ["Lien signalé cassé"], "nom": "", "lien": true, "casse": true}, {"url": "http://www.osvdb.org/106311", "domaine": "www.osvdb.org", "editeur": "", "etiquettes": ["Lien signalé cassé"], "nom": "", "lien": true, "casse": true}]}], "liens_correction": [{"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021", "domaine": "docs.microsoft.com", "editeur": "", "etiquettes": ["Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées"}, {"url": "https://technet.microsoft.com/library/security/2963983", "domaine": "technet.microsoft.com", "editeur": "", "etiquettes": ["Mesure de contournement", "Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées"}, {"url": "http://www.kb.cert.org/vuls/id/222929", "domaine": "www.kb.cert.org", "editeur": "CERT/CC", "etiquettes": ["Mesure de contournement", "Avis d'un tiers", "Ressource gouvernementale américaine"], "nom": "", "lien": true, "casse": false, "groupe": "contournement", "groupe_titre": "Mesures de contournement"}], "nb_exploits": 1, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "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": "Aucune", "brut": "N", "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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-416", "nom": "Use After Free", "url": "https://cwe.mitre.org/data/definitions/416.html"}], "owasp": [], "ssvc": {"lignes": [{"nom": "Exploitation", "valeur": "Exploitation active constatée", "brut": "active"}, {"nom": "Automatisable", "valeur": "Oui : l'attaque peut être enchaînée sans intervention humaine", "brut": "yes"}, {"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": "2014-01-29", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2014-04-27", "libelle": "Publication de la vulnérabilité", "qui": "microsoft"}, {"date": "2022-01-28", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2022-07-28", "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": "2026-10-06", "libelle": "Calcul du score EPSS affiché", "qui": "FIRST"}], "liens_officiels": [{"nom": "NVD (NIST)", "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-1776", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2014-1776", "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-2014-1776", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2014-1776", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2014-1776", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2014-1776", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Microsoft", "product": "Internet Explorer", "ranges": ["6", "7", "8", "9", "10", "11"], "first_unaffected": [], "source": "NVD"}, {"vendor": "n/a", "product": "n/a", "ranges": ["n/a"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://learn.microsoft.com/en-us/security-updates/SecurityBulletins/2014/ms14-021?redirectedfrom=MSDN", "https://nvd.nist.gov/vuln/detail/CVE-2014-1776"]}, "consulted_at": "2026-10-07T11:14:21.992437+00:00"}