Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U H H H 9.8 .0026 17.4 —
AFFECTED Product Versions Fixed Cisco RoomOS Software RoomOS 10.11.2.2 – —
TIMELINE Oct 8 Reserved by cisco Jul 15 Published (CNA: cisco) Aug 14 RESCORED — CVE-2026-20156 (Cisco RoomOS Software). CVSS 8.1 → 9.8 (NVD).
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.
| Date | Event | Detail |
|---|---|---|
| October 8, 2025 | Reserved | Reserved by cisco |
| July 15, 2026 | Published | Published (CNA: cisco) |
| August 14, 2026 | RESCORED | RESCORED — CVE-2026-20156 (Cisco RoomOS Software). CVSS 8.1 → 9.8 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Cisco | Cisco RoomOS Software | — | RoomOS 10.11.2.2 | — |
Authoritative record: CVE-2026-20156 at cve.org
Vendors: cisco
Weaknesses: CWE-119
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-20156 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.