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VulnerabilityCVE-2026-20156Published 2026-07-15

CVE-2026-20156 — Cisco RoomOS Software

high

As of 2026-08-14, CVE-2026-20156 is a HIGH-severity vulnerability in Cisco RoomOS Software, CVSS v3.1 8.1, EPSS 0.4% (37.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20156, most recently “Multiple Vulnerabilities in Cisco Identity Services Engine, ISE Passive Identity Connector, and RoomOS (GovCERT.HK A26-07-32)”.

CVSS v3.1
8.1/10High
EPSS
0.4%Higher than 37.8% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
5.6/10Threadlinqs triage score
Published
Updated 2026-08-14
CVSS v3.1 8.1 (HIGH) · EPSS 0.4% (higher than 37.8% of all scored CVEs) · Priority 5.6/10 · Published 2026-07-15

Last updated:

What is 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.

The record classifies CVE-2026-20156 under weakness class CWE-119. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 104 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.1 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
0.4% probability of exploitation in the next 30 days, higher than 37.8% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-07-15, last modified 2026-08-14

Is CVE-2026-20156 being exploited?

It currently carries a trending score of 23 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-20156

No vendor patch reference has been recorded for CVE-2026-20156 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-20156

1 tracked threat in the Threadlinqs corpus references CVE-2026-20156, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .

Other references