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.
Published: 2026-07-15
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability stems from inadequate enforcement of memory buffer boundaries, classified as CWE‑119. An attacker who can supply malformed input to RoomOS may cause a buffer overflow, potentially corrupting memory and leading to arbitrary code execution or a crash that results in denial of service.

Affected Systems

The affected product is Cisco RoomOS Software from Cisco. No specific version ranges are listed, meaning all known releases could be impacted until patched.

Risk and Exploitability

The CVSS score of 8.1 signifies a high severity, while the EPSS score of less than 1% indicates a low probability of exploitation at this time. The vulnerability is not currently catalogued in the CISA KEV list. Based on the description, the likely attack vector would involve an attacker sending specially crafted data to a vulnerable RoomOS interface; the exact prerequisites are not disclosed, so both local and network‑based exploitation remain plausible.

Generated by OpenCVE AI on July 31, 2026 at 03:22 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Cisco RoomOS Security Hardening Release that fixes the buffer overflow vulnerable code.
  • Limit RoomOS network exposure by restricting access to trusted networks or IP ranges.
  • Continuously monitor RoomOS logs and network traffic for signs of exploitation attempts.

Generated by OpenCVE AI on July 31, 2026 at 03:22 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 23 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco cisco Roomos Software
Vendors & Products Cisco
Cisco cisco Roomos Software

Wed, 15 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 15 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities
Weaknesses CWE-119
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

Cisco Cisco Roomos Software
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-07-15T18:05:46.644Z

Reserved: 2025-10-08T11:59:15.387Z

Link: CVE-2026-20156

cve-icon Vulnrichment

Updated: 2026-07-15T18:05:41.475Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T03:30:18Z

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer