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CVE-2026-20156

36
FAUCET Score

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.

First published: Jul 15, 2026Last modified: Jul 15, 2026

Impacted Technologies

VendorProductVersion(s)CPE
CiscoCisco RoomOS Software
RoomOS 10.11.2.2, RoomOS 10.11.3.0, RoomOS 10.11.4.1, RoomOS 10.11.5.2, RoomOS 10.11.6.0, RoomOS 10.15.2.2, RoomOS 10.15.3.0, RoomOS 10.15.4.1, RoomOS 10.15.5.3, RoomOS 10.19 StepUpg, RoomOS 10.19.2.2, RoomOS 10.19.3.0, RoomOS 10.19.4.2, RoomOS 10.19.5.6, RoomOS 10.3.2.0, RoomOS 10.3.2.4, RoomOS 10.3.3.0, RoomOS 10.3.4.0, RoomOS 10.8.2.5, RoomOS 10.8.3.1, RoomOS 10.8.4.0, RoomOS 11.1.2.4, RoomOS 11.1.3.1, RoomOS 11.1.4.1, RoomOS 11.14.2.1, RoomOS 11.14.2.3, RoomOS 11.14.3.0, RoomOS 11.14.4.0, RoomOS 11.14.5.0, RoomOS 11.17.2.2, RoomOS 11.17.3.0, RoomOS 11.17.4.0, RoomOS 11.20.2.3, RoomOS 11.20.3.0, RoomOS 11.23.1.6, RoomOS 11.23.1.8, RoomOS 11.24.1.5, RoomOS 11.24.2.4, RoomOS 11.24.3.0, RoomOS 11.24.4.1, RoomOS 11.27.2.0, RoomOS 11.27.3.0, RoomOS 11.27.4.0, RoomOS 11.27.5.0, RoomOS 11.28.1.3, RoomOS 11.31.1.5, RoomOS 11.32.2.1, RoomOS 11.32.3.0, RoomOS 11.32.4.0, RoomOS 11.32.5.1, RoomOS 11.33.1.7, RoomOS 11.34.1.2, RoomOS 11.35.1.2, RoomOS 11.36.1.1, RoomOS 11.37.1.0, RoomOS 11.38.1.1, RoomOS 11.5.2.4, RoomOS 11.5.3.3, RoomOS 11.5.4.6, RoomOS 11.9.2.4, RoomOS 11.9.3.1, RoomOS 26.0.1.2, RoomOS 26.1.1.5, RoomOS 26.2.2.2, RoomOS 26.3.1.3, RoomOS 26.4.1.4, RoomOS 26.4.1.6, RoomOS 26.5.2.0CNA affecteddefault unknown

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
13.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 1st percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq