Is CVE-2026-20158 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-20158 being exploited in the wild.

How severe is CVE-2026-20158?

High severity, with a CVSS score of 7.5, published 15 July 2026.

Which products and versions are affected?

Cisco RoomOS 11 and earlier; 26; 26.5.2.2.

Is there a fix for CVE-2026-20158?

A patch was published on 2026-07-15. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-20158 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-20158?

Check whether you run Cisco RoomOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-20158: Cisco RoomOS improper resource control denial of service

CVE-2026-20158 · Severity: high · CVSS 7.5 · Published 2026-07-15

Cisco RoomOS, the operating system for Cisco collaboration and video conferencing devices, is affected by resource management vulnerabilities. An attacker could exploit these issues to cause a denial of service, potentially disrupting business meetings and communication services. Cisco has released software updates to address these issues, which were discovered during internal security reviews.

Technologies: Cisco RoomOS. Vendors: Cisco.

Quick answers

Is CVE-2026-20158 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-20158 being exploited in the wild.
How severe is CVE-2026-20158?: High severity, with a CVSS score of 7.5, published 15 July 2026.
Which products and versions are affected?: Cisco RoomOS 11 and earlier; 26; 26.5.2.2.
Is there a fix for CVE-2026-20158?: A patch was published on 2026-07-15. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-20158 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-20158?: Check whether you run Cisco RoomOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Cisco RoomOS contains vulnerabilities related to improper control of a resource through its lifetime (CWE-664), including issues such as uninitialized variables and null pointer dereferences. These vulnerabilities were identified during an internal security hardening review. According to the CVSS vector (AV:N/AC:L/PR:N/UI:N), the most impactful of these issues can be exploited remotely over the network without authentication or user interaction, resulting in a high impact on availability (denial of service). Cisco has released RoomOS 11.32.6.0, 11.39.1.1, and June 2026 (26.7.1.7) to remediate these issues.

Affected products

Cisco RoomOS Software 11 and earlier; 26; 26.5.2.2

Timeline

2026-07-15: advisory
2026-07-15: patched

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq

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