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Vulnerability record · CVE-2026-20156 · published 15 July 2026

CVE-2026-20156: Cisco roomos memory buffer overflow vulnerability

Cisco · Roomos

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.

9.8 CVSS 3.1 Critical EPSS 0.46% · top 62.7% CWE-119 · Memory buffer overflow Undergoing Analysis
9.8CVSS 3.1 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
14 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq Vendor Advisory
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification

Track CVE-2026-20156 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-20157Cisco roomos missing encryption vulnerabilityAs part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive inte…EPSS 0.19%8.8CVE-2026-20150Cisco roomos improper access control vulnerabilityAs part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive inte…EPSS 0.42%8.8CVE-2019-15288Cisco telepresence codec improper input validation vulnerabilityA vulnerability in the CLI of Cisco TelePresence Collaboration Endpoint (CE), Cisco TelePresence Codec (TC), and Cisco RoomOS Software could allow an…EPSS 1.7%8.1CVE-2022-20764Cisco telepresence collaboration endpoint open redirect vulnerabilityMultiple vulnerabilities in the web engine of Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software could allow a remote …EPSS 1.0%7.5CVE-2026-20153Cisco roomos improper input validation vulnerabilityAs part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive inte…EPSS 0.47%7.5CVE-2026-20158Cisco roomos vulnerabilityAs part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive inte…EPSS 0.47%7.5CVE-2026-20187Cisco roomos vulnerabilityAs part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive inte…EPSS 0.47%7.5CVE-2022-20783Cisco telepresence collaboration endpoint improper input validation vulnerabilityA vulnerability in the packet processing functionality of Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software could all…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2026-20156), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.