Vulnerability · Published Apr 15, 2026 · Assigned by cisco
CVE-2026-20152Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability
Medium 5.3
In plain English
A medium-severity security flaw in Cisco Secure Web Appliance from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Web Appliance | 11.8.0-45312.5.3-00212.0.3-00712.0.3-00514.1.0-03214.1.0-04714.1.0-04112.0.4-002 |
Weakness: CWE-305 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N