{"id":"CVE-2026-20156","title":"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","summary":"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 addresse…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-119"],"vendor":"cisco","product":"roomos","affected":["roomos < 11.32.6.0","roomos >= 26.0.1.2, < 26.5.2.2","roomos_cloud < 11.39.1.1","roomos_cloud >= 26.0.1.2, < 26.7.1.7"],"patched":["roomos 26.5.2.2","roomos_cloud 26.7.1.7"],"published":"2026-07-15","updated":"2026-08-14","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20156","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq","label":"psirt@cisco.com"},{"url":"https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00256,"epssPercentile":0.17453,"ingestedAt":"2026-08-15T13:26:46.682Z","slug":"CVE-2026-20156","body":"## Overview\n\nAs 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.\n\n## Affected\n\n- `roomos < 11.32.6.0`\n- `roomos >= 26.0.1.2, < 26.5.2.2`\n- `roomos_cloud < 11.39.1.1`\n- `roomos_cloud >= 26.0.1.2, < 26.7.1.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `roomos 26.5.2.2`\n- `roomos_cloud 26.7.1.7`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}