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TI-2026-16365 Aliases CVE-2026-20156GHSA-gxwc-c8rv-5m26

Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities

Priority MEDIUM 43CWE-119Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20156 are related to improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00459 40th 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
No
Technical impact
Total

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 RoomOS SoftwareRoomOS 10.11.2.2; RoomOS 10.15.2.2; RoomOS 11.5.4.6; RoomOS 11.5.2.4; RoomOS 10.8.2.5; RoomOS 10.11.5.2; RoomOS 10.11.3.0; RoomOS 10.15.5.3; RoomOS 10.19.2.2; RoomOS 11.1.3.1; RoomOS 10.11.6.0; RoomOS 10.19.3.0; RoomOS 10.19.4.2; RoomOS 10.3.2.4; RoomOS 10.3.4.0; RoomOS 10.15.3.0; RoomOS 11.1.4.1; RoomOS 11.14.2.3; RoomOS 11.1.2.4; RoomOS 10.8.3.1; RoomOS 11.14.2.1; RoomOS 10.3.3.0; RoomOS 10.8.4.0; RoomOS 10.15.4.1; RoomOS 10.19.5.6; RoomOS 10.11.4.1; RoomOS 11.9.3.1; RoomOS 11.5.3.3; RoomOS 10.3.2.0; RoomOS 11.9.2.4; RoomOS 11.14.3.0; RoomOS 11.17.2.2; RoomOS 11.14.4.0; RoomOS 10.19 StepUpg; RoomOS 11.17.3.0; RoomOS 11.20.2.3; RoomOS 11.14.5.0; RoomOS 11.17.4.0; RoomOS 11.20.3.0; RoomOS 11.23.1.6; RoomOS 11.23.1.8; RoomOS 11.24.1.5; RoomOS 11.24.2.4; RoomOS 11.24.3.0; RoomOS 11.24.4.1; RoomOS 11.27.2.0; RoomOS 11.28.1.3; RoomOS 11.27.3.0; RoomOS 11.31.1.5; RoomOS 11.27.4.0; RoomOS 11.32.2.1; RoomOS 11.33.1.7; RoomOS 26.0.1.2; RoomOS 11.34.1.2; RoomOS 11.32.3.0; RoomOS 11.27.5.0; RoomOS 11.32.4.0; RoomOS 26.1.1.5; RoomOS 11.35.1.2; RoomOS 26.2.2.2; RoomOS 11.32.5.1; RoomOS 26.4.1.6; RoomOS 26.4.1.4; RoomOS 26.3.1.3; RoomOS 11.36.1.1; RoomOS 11.37.1.0; RoomOS 26.5.2.0; RoomOS 11.38.1.1—No fix listedCNA
  • Cisco RoomOS Software VendorCisco Affected RoomOS 10.11.2.2; RoomOS 10.15.2.2; RoomOS 11.5.4.6; RoomOS 11.5.2.4; RoomOS 10.8.2.5; RoomOS 10.11.5.2; RoomOS 10.11.3.0; RoomOS 10.15.5.3; RoomOS 10.19.2.2; RoomOS 11.1.3.1; RoomOS 10.11.6.0; RoomOS 10.19.3.0; RoomOS 10.19.4.2; RoomOS 10.3.2.4; RoomOS 10.3.4.0; RoomOS 10.15.3.0; RoomOS 11.1.4.1; RoomOS 11.14.2.3; RoomOS 11.1.2.4; RoomOS 10.8.3.1; RoomOS 11.14.2.1; RoomOS 10.3.3.0; RoomOS 10.8.4.0; RoomOS 10.15.4.1; RoomOS 10.19.5.6; RoomOS 10.11.4.1; RoomOS 11.9.3.1; RoomOS 11.5.3.3; RoomOS 10.3.2.0; RoomOS 11.9.2.4; RoomOS 11.14.3.0; RoomOS 11.17.2.2; RoomOS 11.14.4.0; RoomOS 10.19 StepUpg; RoomOS 11.17.3.0; RoomOS 11.20.2.3; RoomOS 11.14.5.0; RoomOS 11.17.4.0; RoomOS 11.20.3.0; RoomOS 11.23.1.6; RoomOS 11.23.1.8; RoomOS 11.24.1.5; RoomOS 11.24.2.4; RoomOS 11.24.3.0; RoomOS 11.24.4.1; RoomOS 11.27.2.0; RoomOS 11.28.1.3; RoomOS 11.27.3.0; RoomOS 11.31.1.5; RoomOS 11.27.4.0; RoomOS 11.32.2.1; RoomOS 11.33.1.7; RoomOS 26.0.1.2; RoomOS 11.34.1.2; RoomOS 11.32.3.0; RoomOS 11.27.5.0; RoomOS 11.32.4.0; RoomOS 26.1.1.5; RoomOS 11.35.1.2; RoomOS 26.2.2.2; RoomOS 11.32.5.1; RoomOS 26.4.1.6; RoomOS 26.4.1.4; RoomOS 26.3.1.3; RoomOS 11.36.1.1; RoomOS 11.37.1.0; RoomOS 26.5.2.0; RoomOS 11.38.1.1 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:*before 11.32.6.0; 26.0.1.2 to before 26.5.2.2VulnerableCisco
cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:*before 11.39.1.1; 26.0.1.2 to before 26.7.1.7VulnerableCisco
  • cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:* Versions before 11.32.6.0; 26.0.1.2 to before 26.5.2.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:* Versions before 11.39.1.1; 26.0.1.2 to before 26.7.1.7 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20156
  2. 2026-10-03 Alias added: GHSA-gxwc-c8rv-5m26

References

Advisory 1

  • TI-2019-11399 Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS Software Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-16366 Cisco RoomOS Security Hardening Release - Missing Encryption Vulnerabilities CVSS 3.1CRITICAL 9.8
  • TI-2022-05342 Cisco TelePresence Collaboration Endpoint and RoomOS Software H.323 Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2019-11400 Cisco TelePresence Collaboration Endpoint and RoomOS Software Denial of Service Vulnerabilities CVSS 3.1HIGH 7.5
  • TI-2026-16359 Cisco RoomOS Security Hardening Release - Access Control Vulnerabilities CVSS 3.1HIGH 8.8
  • TI-2026-16392 Cisco RoomOS Security Hardening Release - Exceptional Conditions Handling Vulnerabilities CVSS 3.1HIGH 7.5
See all 32 →

Sources

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