CVE-2026-20152

Medium

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.

SeverityMedium
CVSS5.3
Exploit probability—
ProductCisco Secure Web Appliance
PublishedApr 15, 2026
First seenApr 15, 2026
Weakness typeCWE-305CWE-305

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
Cisco Cisco Secure Web Appliance11.8.0-453, 12.5.3-002, 12.0.3-007, 12.0.3-005, 14.1.0-032, 14.1.0-047, 14.1.0-041, 12.0.4-002, 14.0.2-012, 11.8.0-414, 12.0.1-268, 11.8.1-023, 11.8.3-021, 11.8.3-018, 12.5.1-011, 11.8.4-004, 12.5.2-007, 12.5.2-011, 14.5.0-498, 12.5.4-005, 12.5.4-011, 12.0.5-011, 14.0.3-014, 12.5.5-004, 12.5.5-005, 12.5.5-008, 14.0.4-005, 14.5.1-008, 14.5.1-016, 15.0.0-355, 15.0.0-322, 12.5.6-008, 15.1.0-287, 14.5.2-011, 15.2.0-116, 14.0.5-007, 15.2.0-164, 14.5.1-510, 12.0.2-012, 12.0.2-004, 14.5.1-607, 14.5.3-033, 15.0.1-004, 15.2.1-011, 14.5.0-673, 14.5.0-537, 12.0.1-334, 14.0.1-503, 14.0.1-053, 11.8.0-429, 14.0.1-040, 14.0.1-014, 12.5.1-043, 15.2.2-009, 15.2.3-007, 15.2.4-022, 15.2.5-011, 15.2.5-013, 14.6.0-108—

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