CVE Catalog

CVE-2026-20152

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.30%

22th percentile - higher than 22% of all known CVEs

Summary

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. It is due to improper validation of user-supplied authentication input in HTTP requests; an attacker could send specially crafted HTTP requests to bypass policy enforcement on the device.

Risk Assessment

An attacker could bypass authentication policy and send HTTP requests that should be restricted by the device. This may lead to unauthorized access to resources that should be protected by Secure Web Appliance.

Recommendation

Apply available Cisco AsyncOS updates for Secure Web Appliance and verify authentication policy rules. Monitor HTTP traffic for policy bypass attempts.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS