CVE-2026-20152 | Cisco Secure Web Appliance up to 15.2.5-013 Authentication Service authentication bypass (cisco-sa-wsa-auth-bypass-6YZkTQhd)

VDB-357745 · CVE-2026-20152 · EUVD-2026-22964 CISCO SECURE WEB APPLIANCE UP TO 15.2.5-013 AUTHENTICATION SERVICE AUTHENTICATION BYPASS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 2.56 Summaryinfo A vulnerability has been found in Cisco Secure Web Appliance and classified as problematic. This vulnerability affects unknown code of the component Authentication Service. This manipulation causes authentication bypass. This vulnerability is registered as CVE-2026-20152. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded. Detailsinfo A vulnerability has been found in Cisco Secure Web Appliance and classified as problematic. Affected by this vulnerability is an unknown part of the component Authentication Service. The manipulation with an unknown input leads to a authentication bypass vulnerability. The CWE definition for the vulnerability is CWE-305. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. As an impact it is known to affect integrity. The summary by CVE is: 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. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2026-20152 since 10/08/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/16/2026). Upgrading eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-22964). Productinfo Vendor Cisco Name Secure Web Appliance Version 11.8.0-414 11.8.0-429 11.8.0-453 11.8.1-023 11.8.3-018 11.8.3-021 11.8.4-004 12.0.1-268 12.0.1-334 12.0.2-004 12.0.2-012 12.0.3-005 12.0.3-007 12.0.4-002 12.0.5-011 12.5.1-011 12.5.1-043 12.5.2-007 12.5.2-011 12.5.3-002 12.5.4-005 12.5.4-011 12.5.5-004 12.5.5-005 12.5.5-008 12.5.6-008 14.0.1-014 14.0.1-040 14.0.1-053 14.0.1-503 14.0.2-012 14.0.3-014 14.0.4-005 14.0.5-007 14.1.0-032 14.1.0-041 14.1.0-047 14.5.0-498 14.5.0-537 14.5.0-673 14.5.1-008 14.5.1-016 14.5.1-510 14.5.1-607 14.5.2-011 14.5.3-033 14.6.0-108 15.0.0-322 15.0.0-355 15.0.1-004 15.1.0-287 15.2.0-116 15.2.0-164 15.2.1-011 15.2.2-009 15.2.3-007 15.2.4-022 15.2.5-011 15.2.5-013 License commercial Website Vendor: https://www.cisco.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.2 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.3 CNA Vector (cisco): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authentication bypass CWE: CWE-305 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 10/08/2025 CVE reserved 04/15/2026 +189 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/16/2026 +0 days VulDB entry last update Sourcesinfo Vendor: cisco.com Advisory: cisco-sa-wsa-auth-bypass-6YZkTQhd Status: Confirmed CVE: CVE-2026-20152 (🔒) GCVE (CVE): GCVE-0-2026-20152 GCVE (VulDB): GCVE-100-357745 EUVD: 🔒 Entryinfo Created: 04/15/2026 18:27 Updated: 04/16/2026 01:07 Changes: 04/15/2026 18:27 (63), 04/16/2026 01:07 (1) Complete: 🔍 Cache ID: 99:74B:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸