Exploitation active confirmée
Ajoutée au catalogue CISA KEV le 30/09/2026, correctif exigé avant le 03/10/2026 pour les agences fédérales américaines.
Action requise : 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.
Description officielle (NVD)
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. This 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.
Preuves de concept publiques (1)
Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.
-
ShadowForge-Cyber/CVE-2026-76504-Proof-of-concept
· ★ 2 · 30/09/2026
EUVD-2026-89950 Improper Handling of URL Encoding (Hex Encoding) (CWE-177)
Références
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU — Mitigation, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504 — US Government Resource
En bref
| Éditeur | Cisco |
| Produit | Catalyst SD-WAN Manager |
| Publiée le | 30/09/2026 |
| Modifiée le | 03/10/2026 |
| CVSS | 9.8 (v3.1) |
| EPSS | 1,82 % (centile 79) |
| CWE | CWE-177 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.
Produits concernés
cisco · catalyst_sd-wan_manager
Besoin d'aide ?
Nos experts évaluent votre exposition et vous accompagnent dans la correction.
Nous contacter