CVE-2026-76504
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Added: 2026-09-30 · Due: 2026-10-03
Known ransomware use: Unknown
As of 2026-10-27
EPSS estimates exploitation probability over the next 30 days. KEV due dates apply to US federal civilian agencies. Confirm your affected versions in vendor advisories.
CWE: CWE-177 · Published: 2026-09-30T13:17:20.247 · Modified: 2026-10-03T00:16:39.140
Sources: NIST NVD, CISA KEV, FIRST EPSS. NVD and EPSS cached up to 6 hours; KEV up to 12 hours.