CVE-2026-20152
Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability
Description
A vulnerability in the authentication service feature of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass authentication policy requirements. This vulnerability is due to improper validation of user-supplied authentication input in HTTP requests. An attacker could exploit this vulnerability by sending HTTP requests that contain specific authentication requests to an affected device. A successful exploit could allow the attacker to bypass policy enforcement on the device. There is no direct impact to the Cisco Secure Web Appliance. However, as a result of exploiting this vulnerability, an attacker could send HTTP requests that should be restricted through the device.
Weakness: CWE-305
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Web Appliance | SASE / SSE / Secure Web | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Web Appliance
Vendor advisory
cisco-sa-wsa-auth-bypass-6YZkTQhd
Cisco Secure Web Appliance Authentication Bypass Vulnerability
Cisco’s rating: Medium (advisory CVSS 5.3) · Published Apr 15, 2026 · updated Apr 16, 2026 (revision 1.1)
Bug ID: CSCwr20696
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from