Read the docs
TI-2026-16361 Aliases CVE-2026-20152GHSA-v3r6-6788-v9xh

Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability

Priority LOW 30CWE-305Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

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. 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00299 22nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco 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—No fix listedCNA
  • Cisco Secure Web Appliance VendorCisco Affected 11.8.0-453; 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 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*——Cisco
  • cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20152
  2. 2026-10-03 Alias added: GHSA-v3r6-6788-v9xh

References

Other 1

  • TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
See all 7059 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences