{"item": {"cve_id": "CVE-2026-76504", "ghsa_id": "", "osv_id": "", "title": "Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability", "description": "A vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user.\r\n\r\nThis vulnerability is due to improper handling of URI encoding in an HTTP request, which allows the request to bypass an authentication rule that is intended to restrict access to a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted HTTP request to the API of the affected system. A successful exploit could allow the attacker to bypass authentication and gain access to the API as the admin user.", "published_at": "2026-09-30T13:17:20.247", "modified_at": "2026-10-03T00:16:39.140", "vendor": "Cisco", "product": "Catalyst Sd-wan Manager", "affected_versions": ["20.1.12", "19.2.1", "18.4.4", "18.4.5", "20.1.1.1", "20.1.1", "19.3.0", "19.2.2", "19.2.099", "18.3.6", "18.3.7", "19.2.0", "18.3.8", "19.0.0", "19.1.0", "18.4.302", "18.4.303", "19.2.097", "19.2.098", "17.2.10", "18.3.6.1", "19.0.1a", "18.2.0", "18.4.3", "18.4.1", "17.2.8", "18.3.3.1", "18.4.0", "18.3.1", "17.2.6", "17.2.9", "18.3.4", "17.2.5", "18.3.1.1", "18.3.5", "18.4.0.1", "18.3.3", "17.2.7", "17.2.4", "18.3.0", "19.2.3", "18.4.501_ES", "20.3.1", "20.1.2", "19.2.929", "19.2.31", "20.3.2", "19.2.32", "20.3.2_925", "20.3.2.1", "20.3.2.1_927", "18.4.6", "20.1.2_937", "20.4.1", "20.3.2_928", "20.3.2_929", "20.4.1.0.1", "20.3.2.1_930", "19.2.4", "20.5.0.1.1", "20.4.1.1", "20.3.3", "19.2.4.0.1", 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"26.1.2_LI_Images", "26.1.2", "20.15.6.0.5_PSIRTAUG", "20.18.4.0.5_PSIRTAUG", "20.12.8.1.1", "20.9.10.0.01", "26.1.2.0.02", "26.2.1_LI_Images", "20.18.4.1.01", "26.1.2.1_LI_Images", "20.15.6.1_LI_Images", "20.18.4.1_LI_Images", "20.9.10.1.01", "20.15.6.1.01", "26.1.2.1.01", "20.12.8.2.01"], "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": 0.01819, "epss_percentile": 0.78034, "epss_date": "2026-10-06", "is_kev": true, "kev_date": "2026-09-30", "kev_due_date": "2026-10-03", "kev_action": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "cwe_ids": ["CWE-177"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "references": ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2026-76504", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2026-76504", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2026-76504"}, "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-sdwan-webauth-xr8beuuU", "tags": ["Mitigation", "Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504", "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": "2026-08-19T12:02:03.641Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "yes", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2026-09-30T00:00:00+00:00", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Cisco", "product": "Catalyst Sd-wan Manager", "ranges": ["avant 20.9.10.1", "de 20.12 à 20.12.8.2 (exclue)", "de 20.15 à 20.15.6.1 (exclue)", "de 20.18 à 20.18.4.1 (exclue)", "de 26.1 à 26.1.2.1 (exclue)", "26.2"], "first_unaffected": ["20.9.10.1", "20.12.8.2", "20.15.6.1", "20.18.4.1", "26.1.2.1"], "source": "NVD"}, {"vendor": "Cisco", "product": "Cisco Catalyst SD-WAN Manager", "ranges": ["20.1.12", "19.2.1", "18.4.4", "18.4.5", "20.1.1.1", "20.1.1", "19.3.0", "19.2.2", "19.2.099", "18.3.6", "18.3.7", "19.2.0", "18.3.8", "19.0.0", "19.1.0", "18.4.302", "18.4.303", "19.2.097", "19.2.098", "17.2.10"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability", "kev_short_description": "Cisco Catalyst SD-WAN Manager contains a hex encoding vulnerability that could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user due to improper handling of URI encoding in an HTTP request.", "kev_ransomware": "Unknown", "kev_notes": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-76504", "kev_cwes": ["CWE-177"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 77, "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": "", "mitigation": {"correction": {"available": true, "text": "Mettre à jour : selon les sources, ne sont plus concernées les versions à partir de Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1, Catalyst Sd-wan Manager 20.18.4.1, Catalyst Sd-wan Manager 26.1.2.1."}, "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 mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "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-sdwan-webauth-xr8beuuU", "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": "Faille de sécurité signalée dans Catalyst Sd-wan Manager", "headline_is_derived": false, "action": "Mettre à jour vers Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1 ou plus récent, version publiée comme non concernée.", "action_kind": "update", "concerned": [{"version": "Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1 ou plus récent", "state": "safe", "state_label": "Non concerné", "todo": "Rien à faire. Gardez les mises à jour automatiques activées."}, {"version": "20.1.12, 19.2.1, 18.4.4, 18.4.5", "state": "hit", "state_label": "Concerné", "todo": "Mettre à jour vers Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1 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 Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1 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": "Catalyst Sd-wan Manager 20.9.10.1, Catalyst Sd-wan Manager 20.12.8.2, Catalyst Sd-wan Manager 20.15.6.1 (non concernée selon les sources)", "affected_label": "20.1.12, 19.2.1, 18.4.4, 18.4.5"}, "severity_display": "Critique", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2026-76504", "severity_fr": "Critique", "epss_pct": 1.8, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2026-09-30", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76504"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2026-09-30", "url": "https://www.cve.org/CVERecord?id=CVE-2026-76504"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2026-09-30", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504"}, {"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-2026-76504"}], "exploit_public": false, "reseau_sans_auth": true, "exposition": "À distance, sans compte et sans action d'un utilisateur", "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 : 20.9.10.1, 20.12.8.2, 20.15.6.1, 20.18.4.1…", "source": "Versions publiées comme non concernées"}, {"question": "Comment l'attaquer ?", "ton": "alerte", "reponse": "À distance, sans compte et sans action d'un utilisateur", "source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "vigilance", "reponse": "1,8 % sur 30 jours", "source": "Plus probable que 78 % 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-sdwan-webauth-xr8beuuU", "domaine": "sec.cloudapps.cisco.com", "editeur": "Cisco", "etiquettes": ["Mesure de contournement", "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-2026-76504", "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-sdwan-webauth-xr8beuuU", "domaine": "sec.cloudapps.cisco.com", "editeur": "Cisco", "etiquettes": ["Mesure de contournement", "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: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-177", "nom": "", "url": "https://cwe.mitre.org/data/definitions/177.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": "2026-09-30", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2026-08-19", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2026-09-30", "libelle": "Publication de la vulnérabilité", "qui": "cisco"}, {"date": "2026-09-30", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2026-09-30", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2026-10-03", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2026-10-03", "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-2026-76504", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2026-76504", "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-2026-76504", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76504", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2026-76504", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2026-76504", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Cisco", "product": "Catalyst Sd-wan Manager", "ranges": ["avant 20.9.10.1", "de 20.12 à 20.12.8.2 (exclue)", "de 20.15 à 20.15.6.1 (exclue)", "de 20.18 à 20.18.4.1 (exclue)", "de 26.1 à 26.1.2.1 (exclue)", "26.2"], "first_unaffected": ["20.9.10.1", "20.12.8.2", "20.15.6.1", "20.18.4.1", "26.1.2.1"], "source": "NVD"}, {"vendor": "Cisco", "product": "Cisco Catalyst SD-WAN Manager", "ranges": ["20.1.12", "19.2.1", "18.4.4", "18.4.5", "20.1.1.1", "20.1.1", "19.3.0", "19.2.2", "19.2.099", "18.3.6", "18.3.7", "19.2.0", "18.3.8", "19.0.0", "19.1.0", "18.4.302", "18.4.303", "19.2.097", "19.2.098", "17.2.10"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU", "https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk", "https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk", "https://nvd.nist.gov/vuln/detail/CVE-2026-76504"]}, "consulted_at": "2026-10-07T03:50:18.702433+00:00"}