Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities
Summary
| CVE | CVE-2026-20156 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-15 17:16:47 UTC |
| Updated | 2026-07-15 19:17:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.1 HIGH from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.002280000 probability, percentile 0.135550000 (date 2026-07-19)
Problem Types: CWE-119 | CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSSV3_1 | 8.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.11.2.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.15.2.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.5.4.6 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.5.2.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.8.2.5 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.11.5.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.11.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.15.5.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.19.2.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.1.3.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.11.6.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.19.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.19.4.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.3.2.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.3.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.15.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.1.4.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.14.2.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.1.2.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.8.3.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.14.2.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.3.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.8.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.15.4.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.19.5.6 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.11.4.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.9.3.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.5.3.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.3.2.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.9.2.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.14.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.17.2.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.14.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 10.19 StepUpg | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.17.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.20.2.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.14.5.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.17.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.20.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.23.1.6 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.23.1.8 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.24.1.5 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.24.2.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.24.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.24.4.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.27.2.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.28.1.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.27.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.31.1.5 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.27.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.32.2.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.33.1.7 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.0.1.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.34.1.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.32.3.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.27.5.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.32.4.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.1.1.5 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.35.1.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.2.2.2 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.32.5.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.4.1.6 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.4.1.4 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.3.1.3 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.36.1.1 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.37.1.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 26.5.2.0 | Not specified |
| CNA | Cisco | Cisco RoomOS Software | affected RoomOS 11.38.1.1 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-harden... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
There are currently no legacy QID mappings associated with this CVE.