CVE-2026-20156 Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities

High 8.1 Published 15 Jul 2026 Updated 14 Aug 2026

Cisco RoomOS contains buffer management vulnerabilities allowing potential code execution or denial of service, requiring a security hardening update.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20156?

CVE-2026-20156 is a high-severity memory corruption vulnerability in Cisco RoomOS Software, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-119

Which versions are affected by CVE-2026-20156?

It affects 2 products.

Products include Cisco Roomos, Cisco Roomos Cloud.

How do I fix CVE-2026-20156?

No fix has been published for CVE-2026-20156 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-20156 being exploited?

There is no known exploitation of CVE-2026-20156 in the wild and no public exploit code.

Sources

Also known as GHSA-gxwc-c8rv-5m26.