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TI-2026-78823 Aliases CVE-2026-76435GHSA-667p-34p2-c6m9

Information disclosure in Cisco Expressway Series

Priority LOW 30CWE-497Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-497.

Summary

Cisco Expressway Series, covering Expressway-C and Expressway-E devices, is affected. Insufficient authorization checks of HTTP requests during Mobile and Remote Access (MRA) provisioning let an unauthenticated remote attacker obtain sensitive information from an affected device (CWE-497).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A vulnerability in Cisco Expressway Series could allow an unauthenticated, remote attacker to obtain sensitive information from an affected device. This vulnerability is due to insufficient authorization checks of HTTP requests during Mobile and Remote Access (MRA) provisioning. An attacker could exploit this vulnerability by submitting a crafted URL request to an affected device. A successful exploit could allow the attacker to access sensitive information that they would otherwise not have authorization to access. Note: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00432 37th 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 TelePresence Video Communication Server (VCS) ExpresswayX8.11.2; X8.6; X8.11.3; X8.2.2; X8.8.3; X8.11.0; X12.5.2; X8.1.1; X8.9; X12.5.1; X12.5.6; X8.7.3; X12.6.0; X8.11.1; X8.5; X8.9.1; X8.10.2; X8.8.2; X8.5.3; X8.1; X8.9.2; X8.11.4; X12.5.4; X8.8.1; X8.2.1; X8.5.1; X8.6.1; X8.1.2; X8.8; X8.10.0; X12.5.3; X8.10.1; X12.5.7; X8.10.3; X8.7.1; X8.2; X12.5.8; X8.7; X8.5.2; X12.5.9; X12.5.0; X8.10.4; X8.7.2; X12.5.5; X12.6.1; X12.6.2; X12.6.3; X12.6.4; X12.7.0; X12.7.1; X14.0.0; X14.0.1; X14.0.2; X14.0.3; X14.0.4; X14.0.5; X14.0.6; X14.0.7; X14.0.8; X14.2.0; X14.0.9; X14.2.1; X14.2.2; X14.0.11; X14.2.5; X14.0.10; X14.2.6; X14.2.7; X14.3.0; X14.3.1; X14.3.2; X14.3.3; X15.0.0; X14.3.4; X14.3.5; X15.0.1; X15.0.2; X15.0.3; X14.3.6; X15.2.0; X15.2.1; X15.2.2; X15.2.3; X14.3.7; X15.2.4.; X15.2.4; X15.3.0; X15.3.1; X15.3.2; X15.4.0; X15.5.0; X15.5.1; X15.5.2—No fix listedCNA
  • Cisco TelePresence Video Communication Server (VCS) Expressway VendorCisco Affected X8.11.2; X8.6; X8.11.3; X8.2.2; X8.8.3; X8.11.0; X12.5.2; X8.1.1; X8.9; X12.5.1; X12.5.6; X8.7.3; X12.6.0; X8.11.1; X8.5; X8.9.1; X8.10.2; X8.8.2; X8.5.3; X8.1; X8.9.2; X8.11.4; X12.5.4; X8.8.1; X8.2.1; X8.5.1; X8.6.1; X8.1.2; X8.8; X8.10.0; X12.5.3; X8.10.1; X12.5.7; X8.10.3; X8.7.1; X8.2; X12.5.8; X8.7; X8.5.2; X12.5.9; X12.5.0; X8.10.4; X8.7.2; X12.5.5; X12.6.1; X12.6.2; X12.6.3; X12.6.4; X12.7.0; X12.7.1; X14.0.0; X14.0.1; X14.0.2; X14.0.3; X14.0.4; X14.0.5; X14.0.6; X14.0.7; X14.0.8; X14.2.0; X14.0.9; X14.2.1; X14.2.2; X14.0.11; X14.2.5; X14.0.10; X14.2.6; X14.2.7; X14.3.0; X14.3.1; X14.3.2; X14.3.3; X15.0.0; X14.3.4; X14.3.5; X15.0.1; X15.0.2; X15.0.3; X14.3.6; X15.2.0; X15.2.1; X15.2.2; X15.2.3; X14.3.7; X15.2.4.; X15.2.4; X15.3.0; X15.3.1; X15.3.2; X15.4.0; X15.5.0; X15.5.1; X15.5.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Cisco TelePresence Video Communication Server (VCS) Expressway.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-76435
  2. 2026-10-21 Alias added: GHSA-667p-34p2-c6m9
  3. 2026-10-22 CISA SSVC decision points changed

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