CVE-2026-20156

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 v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:cisco:roomos::::::::
	cpe:2.3:o:cisco:roomos::::::::
	cpe:2.3:o:cisco:roomos_cloud::::::::
	cpe:2.3:o:cisco:roomos_cloud::::::::

History

No history.

Information

Published : 2026-07-15 17:16

Updated : 2026-08-14 21:17

NVD link : CVE-2026-20156

Mitre link : CVE-2026-20156

CVE.ORG link : CVE-2026-20156

JSON object : View

Products Affected

cisco

roomos_cloud
roomos

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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"RoomOS 10.11.6.0"}, {"status": "affected", "version": "RoomOS 10.19.3.0"}, {"status": "affected", "version": "RoomOS 10.19.4.2"}, {"status": "affected", "version": "RoomOS 10.3.2.4"}, {"status": "affected", "version": "RoomOS 10.3.4.0"}, {"status": "affected", "version": "RoomOS 10.15.3.0"}, {"status": "affected", "version": "RoomOS 11.1.4.1"}, {"status": "affected", "version": "RoomOS 11.14.2.3"}, {"status": "affected", "version": "RoomOS 11.1.2.4"}, {"status": "affected", "version": "RoomOS 10.8.3.1"}, {"status": "affected", "version": "RoomOS 11.14.2.1"}, {"status": "affected", "version": "RoomOS 10.3.3.0"}, {"status": "affected", "version": "RoomOS 10.8.4.0"}, {"status": "affected", "version": "RoomOS 10.15.4.1"}, {"status": "affected", "version": "RoomOS 10.19.5.6"}, {"status": "affected", "version": "RoomOS 10.11.4.1"}, {"status": "affected", "version": "RoomOS 11.9.3.1"}, {"status": "affected", "version": "RoomOS 11.5.3.3"}, {"status": "affected", "version": "RoomOS 10.3.2.0"}, {"status": "affected", "version": "RoomOS 11.9.2.4"}, {"status": "affected", "version": "RoomOS 11.14.3.0"}, {"status": "affected", "version": "RoomOS 11.17.2.2"}, {"status": "affected", "version": "RoomOS 11.14.4.0"}, {"status": "affected", "version": "RoomOS 10.19 StepUpg"}, {"status": "affected", "version": "RoomOS 11.17.3.0"}, {"status": "affected", "version": "RoomOS 11.20.2.3"}, {"status": "affected", "version": "RoomOS 11.14.5.0"}, {"status": "affected", "version": "RoomOS 11.17.4.0"}, {"status": "affected", "version": "RoomOS 11.20.3.0"}, {"status": "affected", "version": "RoomOS 11.23.1.6"}, {"status": "affected", "version": "RoomOS 11.23.1.8"}, {"status": "affected", "version": "RoomOS 11.24.1.5"}, {"status": "affected", "version": "RoomOS 11.24.2.4"}, {"status": "affected", "version": "RoomOS 11.24.3.0"}, {"status": "affected", "version": "RoomOS 11.24.4.1"}, {"status": "affected", "version": "RoomOS 11.27.2.0"}, {"status": "affected", "version": "RoomOS 11.28.1.3"}, {"status": "affected", "version": "RoomOS 11.27.3.0"}, {"status": "affected", "version": "RoomOS 11.31.1.5"}, {"status": "affected", "version": "RoomOS 11.27.4.0"}, {"status": "affected", "version": "RoomOS 11.32.2.1"}, {"status": "affected", "version": "RoomOS 11.33.1.7"}, {"status": "affected", "version": "RoomOS 26.0.1.2"}, {"status": "affected", "version": "RoomOS 11.34.1.2"}, {"status": "affected", "version": "RoomOS 11.32.3.0"}, {"status": "affected", "version": "RoomOS 11.27.5.0"}, {"status": "affected", "version": "RoomOS 11.32.4.0"}, {"status": "affected", "version": "RoomOS 26.1.1.5"}, {"status": "affected", "version": "RoomOS 11.35.1.2"}, {"status": "affected", "version": "RoomOS 26.2.2.2"}, {"status": "affected", "version": "RoomOS 11.32.5.1"}, {"status": "affected", "version": "RoomOS 26.4.1.6"}, {"status": "affected", "version": "RoomOS 26.4.1.4"}, {"status": "affected", "version": "RoomOS 26.3.1.3"}, {"status": "affected", "version": "RoomOS 11.36.1.1"}, {"status": "affected", "version": "RoomOS 11.37.1.0"}, {"status": "affected", "version": "RoomOS 26.5.2.0"}, {"status": "affected", "version": "RoomOS 11.38.1.1"}], "defaultStatus": "unknown"}]}], "published": "2026-07-15T17:16:47.380", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}, {"url": "https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Undergoing Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "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.\r\n\r\nThe 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."}], "lastModified": "2026-08-14T21:17:12.917", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2DAB6FC3-5699-48C7-9CCE-81F9BF3811F2", "versionEndExcluding": "11.32.6.0"}, {"criteria": "cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B625A5DE-98DE-44D5-9044-939413A66689", "versionEndExcluding": "26.5.2.2", "versionStartIncluding": "26.0.1.2"}, {"criteria": "cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AC956F89-2FDE-4CD9-838A-8CF133177236", "versionEndExcluding": "11.39.1.1"}, {"criteria": "cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4A01FB2F-C564-428C-912C-175920AEF60C", "versionEndExcluding": "26.7.1.7", "versionStartIncluding": "26.0.1.2"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}