CVE-2026-20158

Modified Modified - Updated After Analysis

Memory Corruption in Cisco RoomOS

Publication date: 2026-07-15

Last updated on: 2026-08-14

Assigner: Cisco Systems, Inc.

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-2026-20158 are related to improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-15

Last Modified

2026-08-14

Generated

2026-08-25

AI Q&A

2026-07-16

EPSS Evaluated

2026-08-23

NVD

CVE-2026-20158

EUVD

EUVD-2026-44721

Affected Vendors & Products

Vendor	Product	Version / Range
cisco	roomos	From 26.0.1.2 (inc) to 26.5.2.2 (exc)
cisco	roomos	to 11.32.6.0 (exc)
cisco	roomos_cloud	to 11.39.1.1 (exc)
cisco	roomos_cloud	From 26.0.1.2 (inc) to 26.7.1.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-664	The product does not maintain or incorrectly maintains control over a resource throughout its lifetime of creation, use, and release.

Attack-Flow Graph

Executive Summary

CVE-2026-20158 is a vulnerability in Cisco RoomOS software identified during an internal security review. It involves improper control of a resource throughout its lifetime, classified under CWE-664. This means the software may fail to properly manage system resources, potentially leading to instability or crashes.

Detection Guidance

The provided context does not include specific detection methods or commands for CVE-2026-20158. Cisco's advisory recommends upgrading to fixed software versions to mitigate the risk.

Impact Analysis

This vulnerability could lead to system crashes or denial of service due to improper resource management, potentially disrupting Cisco RoomOS operations. The high CVSS score suggests significant availability impact.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves improper resource control (CWE-664) and has a CVSS score of 7.5, indicating potential availability impacts. Compliance implications would depend on how the vulnerability is exploited in a specific environment.

Mitigation Strategies

Upgrade to the fixed software versions specified in Cisco's advisory for RoomOS. No workarounds are available, so applying the official patches is critical to mitigate the risk.

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