Vulnerability in Cisco Secure Web Appliance
CVE-2026-20152
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.
EPSS: 0.003 (22.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Cisco Secure Web Appliance — versions 11.8.0-453, 12.5.3-002, 12.0.3-007
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20152?
- CVE-2026-20152 is a medium-severity vulnerability in Cisco Secure Web Appliance, classified under Authentication Bypass by Primary Weakness. CVSS score: 5.3/10. Published 2026-04-15.
- How severe is CVE-2026-20152?
- Medium severity. CVSS v3 base score is 5.3 out of 10.