cisco-sa-wsa-auth-bypass-6YZkTQhdMediumCVSS 5.3

Cisco Secure Web Appliance Authentication Bypass Vulnerability

Published
April 15, 2026
Last Modified
April 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-20152 →

📋 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.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVE-2026-20152 — Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability (CVSS 3.1 5.3, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

🎯 Affected products56

  • Cisco Secure Web Appliance
  • Cisco Secure Web Appliance 11.8.0-414
  • Cisco Secure Web Appliance 11.8.0-429
  • Cisco Secure Web Appliance 11.8.0-453
  • Cisco Secure Web Appliance 11.8.1-023
  • Cisco Secure Web Appliance 11.8.3-018
  • Cisco Secure Web Appliance 11.8.3-021
  • Cisco Secure Web Appliance 11.8.4-004
  • Cisco Secure Web Appliance 12.0.1-268
  • Cisco Secure Web Appliance 12.0.1-334
  • Cisco Secure Web Appliance 12.0.3-005
  • Cisco Secure Web Appliance 12.0.3-007
  • Cisco Secure Web Appliance 12.0.4-002
  • Cisco Secure Web Appliance 12.0.5-011
  • Cisco Secure Web Appliance 12.5.1-011
  • Cisco Secure Web Appliance 12.5.1-043
  • Cisco Secure Web Appliance 12.5.2-007
  • Cisco Secure Web Appliance 12.5.2-011
  • Cisco Secure Web Appliance 12.5.3-002
  • Cisco Secure Web Appliance 12.5.4-005
  • Cisco Secure Web Appliance 12.5.4-011
  • Cisco Secure Web Appliance 12.5.5-004
  • Cisco Secure Web Appliance 12.5.5-005
  • Cisco Secure Web Appliance 12.5.6-008
  • Cisco Secure Web Appliance 14.0.1-014
  • Cisco Secure Web Appliance 14.0.1-040
  • Cisco Secure Web Appliance 14.0.1-053
  • Cisco Secure Web Appliance 14.0.1-503
  • Cisco Secure Web Appliance 14.0.2-012
  • Cisco Secure Web Appliance 14.0.3-014
  • +26 more not shown

✅ Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com Workarounds: There are no workarounds that address this vulnerability.

🔗 References (2)