{"item": {"cve_id": "CVE-2023-20273", "ghsa_id": "", "osv_id": "", "title": "CVE-2023-20273", "description": "A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges.", "published_at": "2023-10-25T18:17:23.017", "modified_at": "2026-06-17T05:30:12.820", "vendor": "Cisco", "product": "Ios Xe", "affected_versions": ["16.1.1", "16.1.2", "16.1.3", "16.2.1", "16.2.2", "16.3.1", "16.3.2", "16.3.3", "16.3.1a", "16.3.4", "16.3.5", "16.3.5b", "16.3.6", "16.3.7", "16.3.8", "16.3.9", "16.3.10", "16.3.11", "16.4.1", "16.4.2", "16.4.3", "16.5.1", "16.5.1a", "16.5.1b", "16.5.2", "16.5.3", "16.6.1", "16.6.2", "16.6.3", "16.6.4", "16.6.5", "16.6.4a", "16.6.5a", "16.6.6", "16.6.7", "16.6.8", "16.6.9", "16.6.10", "16.7.1", "16.7.1a", "16.7.1b", "16.7.2", "16.7.3", "16.7.4", "16.8.1", "16.8.1a", "16.8.1b", "16.8.1s", "16.8.1c", "16.8.1d", "16.8.2", "16.8.1e", "16.8.3", "16.9.1", "16.9.2", "16.9.1a", "16.9.1b", "16.9.1s", "16.9.3", "16.9.4", "16.9.3a", "16.9.5", "16.9.5f", "16.9.6", "16.9.7", "16.9.8", "16.10.1", "16.10.1a", "16.10.1b", "16.10.1s", "16.10.1c", "16.10.1e", "16.10.1d", "16.10.2", "16.10.1f", "16.10.1g", "16.10.3", "16.11.1", "16.11.1a", "16.11.1b", "16.11.2", "16.11.1s", "16.12.1", "16.12.1s", "16.12.1a", "16.12.1c", "16.12.1w", "16.12.2", "16.12.1y", "16.12.2a", "16.12.3", "16.12.8", "16.12.2s", "16.12.1x", "16.12.1t", "16.12.4", "16.12.3s", "16.12.3a", "16.12.4a", "16.12.5", "16.12.6", "16.12.1z1", "16.12.5a", "16.12.5b", "16.12.1z2", "16.12.6a", "16.12.7", "16.12.9", "16.12.10", "17.1.1", "17.1.1a", "17.1.1s", "17.1.1t", "17.1.3", "17.2.1", "17.2.1r", "17.2.1a", "17.2.1v", "17.2.2", "17.2.3", "17.3.1", "17.3.2", "17.3.3", "17.3.1a", "17.3.1w", "17.3.2a", "17.3.1x", "17.3.1z", "17.3.4", "17.3.5", "17.3.4a", "17.3.6", "17.3.4b", "17.3.4c", "17.3.5a", "17.3.5b", "17.3.7", "17.3.8", "17.4.1", "17.4.2", "17.4.1a", "17.4.1b", "17.4.2a", "17.5.1", "17.5.1a", "17.5.1b", "17.5.1c", "17.6.1", "17.6.2", "17.6.1w", "17.6.1a", "17.6.1x", "17.6.3", "17.6.1y", "17.6.1z", "17.6.3a", "17.6.4", "17.6.1z1", "17.6.5", "17.6.6", "17.7.1", "17.7.1a", "17.7.1b", "17.7.2", "17.10.1", "17.10.1a", "17.10.1b", "17.8.1", "17.8.1a", "17.9.1", "17.9.1w", "17.9.2", "17.9.1a", "17.9.1x", "17.9.1y", "17.9.3", "17.9.2a", "17.9.1x1", "17.9.3a", "17.9.4", "17.9.1y1", "17.11.1", "17.11.1a", "17.12.1", "17.12.1a", "17.11.99SW"], "fixed_versions": [], "cvss_score": 7.2, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "severity": "HIGH", "epss_score": 0.89634, "epss_percentile": 0.99786, "epss_date": "2026-10-06", "is_kev": true, "kev_date": "2023-10-23", "kev_due_date": "2023-10-27", "kev_action": "Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.", "cwe_ids": ["CWE-78"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "HIGH", "user_interaction": "NONE", "references": ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2023-20273", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2023-20273", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2023-20273"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "tags": ["Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "tags": ["Vendor Advisory", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273", "tags": ["US Government Resource", "government-resource"], "source": "NVD", "name": ""}], "cvss_v4_score": null, "cvss_v4_vector": "", "cvss_v4_severity": "", "nvd_status": "Analyzed", "cna": "cisco", "date_reserved": "2022-10-27T18:47:50.373Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "no", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2023-11-15T16:39:19.546517Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Cisco", "product": "Ios Xe", "ranges": ["16.1.1", "16.1.2", "16.1.3", "16.2.1", "16.2.2", "16.3.1a", "16.3.2", "16.3.3", "16.3.4", "16.3.5", "16.3.5b", "16.3.6", "16.3.7", "16.3.8"], "first_unaffected": ["17.3.8a", "17.6.6a", "17.9.4a", "16.12.10a"], "source": "NVD"}, {"vendor": "Cisco", "product": "Cisco IOS XE Software", "ranges": ["16.1.1", "16.1.2", "16.1.3", "16.2.1", "16.2.2", "16.3.1", "16.3.2", "16.3.3", "16.3.1a", "16.3.4", "16.3.5", "16.3.5b", "16.3.6", "16.3.7", "16.3.8", "16.3.9", "16.3.10", "16.3.11", "16.4.1", "16.4.2"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Cisco IOS XE Web UI Command Injection Vulnerability", "kev_short_description": "Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.", "kev_ransomware": "Unknown", "kev_notes": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z;  https://nvd.nist.gov/vuln/detail/CVE-2023-20273", "kev_cwes": ["CWE-78"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 72, "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), avec des privilèges existants, affecter la confidentialité des données, l'intégrité du système et la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Injection de commande système : des entrées mal contrôlées peuvent influer sur des commandes exécutées par le serveur.", "mitigation": {"correction": {"available": true, "text": "Mettre à jour : selon les sources, ne sont plus concernées les versions à partir de Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a, Ios Xe 16.12.10a."}, "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 : Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.", "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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur", "editeur": "Cisco", "domaine": "sec.cloudapps.cisco.com"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Un attaquant peut faire exécuter ses propres commandes au serveur", "headline_is_derived": true, "action": "Mettre à jour vers Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a ou plus récent, version publiée comme non concernée.", "action_kind": "update", "concerned": [{"version": "Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a ou plus récent", "state": "safe", "state_label": "Non concerné", "todo": "Rien à faire. Gardez les mises à jour automatiques activées."}, {"version": "16.1.1, 16.1.2, 16.1.3, 16.2.1", "state": "hit", "state_label": "Concerné", "todo": "Mettre à jour vers Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a 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 Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a 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": "Ios Xe 17.3.8a, Ios Xe 17.6.6a, Ios Xe 17.9.4a (non concernée selon les sources)", "affected_label": "16.1.1, 16.1.2, 16.1.3, 16.2.1"}, "severity_display": "Élevée", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2023-20273", "severity_fr": "Élevée", "epss_pct": 89.6, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2023-10-25", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-20273"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2023-10-25", "url": "https://www.cve.org/CVERecord?id=CVE-2023-20273"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2023-10-23", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273"}, {"source": "FIRST EPSS", "label": "FIRST EPSS", "date_label": "Score daté du", "date": "2026-10-06", "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-20273"}], "exploit_public": false, "reseau_sans_auth": false, "exposition": "À distance, sous conditions (compte ou action d'un utilisateur)", "owasp": [{"code": "A05", "nom": "Injection", "nom_officiel": "Injection", "slug": "a05-injection", "libelle": "A05:2025 Injection", "url_officielle": "https://top10.owasp.org/2025/A05_2025-Injection/"}]}, "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 : 17.3.8a, 17.6.6a, 17.9.4a, 16.12.10a", "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": "89,6 % sur 30 jours", "source": "Plus probable que 100 % des failles connues"}], "references": [{"cle": "avis_editeur", "titre": "Avis de sécurité de l'éditeur", "explication": "La parole de l'éditeur du produit : elle fait foi pour savoir quoi installer.", "items": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "domaine": "sec.cloudapps.cisco.com", "editeur": "Cisco", "etiquettes": ["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": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273", "domaine": "www.cisa.gov", "editeur": "CISA", "etiquettes": ["Ressource gouvernementale américaine", "Ressource gouvernementale"], "nom": "", "lien": true, "casse": false}]}], "liens_correction": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "domaine": "sec.cloudapps.cisco.com", "editeur": "Cisco", "etiquettes": ["Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur"}], "nb_exploits": 0, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:H/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": "Élevés (compte administrateur)", "brut": "H", "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:H/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-78", "nom": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "url": "https://cwe.mitre.org/data/definitions/78.html"}], "owasp": [{"code": "A05", "nom": "Injection", "nom_officiel": "Injection", "slug": "a05-injection", "libelle": "A05:2025 Injection", "url_officielle": "https://top10.owasp.org/2025/A05_2025-Injection/"}], "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": "2023-11-15", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2022-10-27", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2023-10-23", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2023-10-25", "libelle": "Publication de la vulnérabilité", "qui": "cisco"}, {"date": "2023-10-27", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2023-11-15", "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-2023-20273", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2023-20273", "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-2023-20273", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-20273", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2023-20273", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2023-20273", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Cisco", "product": "Ios Xe", "ranges": ["16.1.1", "16.1.2", "16.1.3", "16.2.1", "16.2.2", "16.3.1a", "16.3.2", "16.3.3", "16.3.4", "16.3.5", "16.3.5b", "16.3.6", "16.3.7", "16.3.8"], "first_unaffected": ["17.3.8a", "17.6.6a", "17.9.4a", "16.12.10a"], "source": "NVD"}, {"vendor": "Cisco", "product": "Cisco IOS XE Software", "ranges": ["16.1.1", "16.1.2", "16.1.3", "16.2.1", "16.2.2", "16.3.1", "16.3.2", "16.3.3", "16.3.1a", "16.3.4", "16.3.5", "16.3.5b", "16.3.6", "16.3.7", "16.3.8", "16.3.9", "16.3.10", "16.3.11", "16.4.1", "16.4.2"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z", "https://nvd.nist.gov/vuln/detail/CVE-2023-20273"]}, "consulted_at": "2026-10-07T00:47:11.631060+00:00"}