{"id":"CVE-2026-20302","state":"PUBLISHED","title":"Cisco RoomOS Stack Overflow Vulnerability","description":"A vulnerability in the USB driver of Cisco RoomOS could allow an unauthenticated, local attacker with physical access to the USB port on an affected device to execute arbitrary code with root privileges.\r\n\r\nThis vulnerability is due to insufficient boundary checks for specific data that is provided through the USB driver. An attacker could exploit this vulnerability by connecting a malicious USB device to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system and execute arbitrary code with root privileges.","publishedAt":"2026-08-19T16:17:07.749Z","updatedAt":"2026-08-20T15:57:08.625Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco RoomOS Software"],"affected":[{"vendor":"Cisco","product":"Cisco RoomOS Software","defaultStatus":"unknown","versions":[{"version":"RoomOS 10.11.2.2","status":"affected"},{"version":"RoomOS 10.15.2.2","status":"affected"},{"version":"RoomOS 11.5.4.6","status":"affected"},{"version":"RoomOS 11.5.2.4","status":"affected"},{"version":"RoomOS 10.8.2.5","status":"affected"},{"version":"RoomOS 10.11.5.2","status":"affected"},{"version":"RoomOS 10.11.3.0","status":"affected"},{"version":"RoomOS 10.15.5.3","status":"affected"},{"version":"RoomOS 10.19.2.2","status":"affected"},{"version":"RoomOS 11.1.3.1","status":"affected"},{"version":"RoomOS 10.11.6.0","status":"affected"},{"version":"RoomOS 10.19.3.0","status":"affected"},{"version":"RoomOS 10.19.4.2","status":"affected"},{"version":"RoomOS 10.3.2.4","status":"affected"},{"version":"RoomOS 10.3.4.0","status":"affected"},{"version":"RoomOS 10.15.3.0","status":"affected"},{"version":"RoomOS 11.1.4.1","status":"affected"},{"version":"RoomOS 11.14.2.3","status":"affected"},{"version":"RoomOS 11.1.2.4","status":"affected"},{"version":"RoomOS 10.8.3.1","status":"affected"},{"version":"RoomOS 11.14.2.1","status":"affected"},{"version":"RoomOS 10.3.3.0","status":"affected"},{"version":"RoomOS 10.8.4.0","status":"affected"},{"version":"RoomOS 10.15.4.1","status":"affected"},{"version":"RoomOS 10.19.5.6","status":"affected"},{"version":"RoomOS 10.11.4.1","status":"affected"},{"version":"RoomOS 11.9.3.1","status":"affected"},{"version":"RoomOS 11.5.3.3","status":"affected"},{"version":"RoomOS 10.3.2.0","status":"affected"},{"version":"RoomOS 11.9.2.4","status":"affected"},{"version":"RoomOS 11.14.3.0","status":"affected"},{"version":"RoomOS 11.17.2.2","status":"affected"},{"version":"RoomOS 11.14.4.0","status":"affected"},{"version":"RoomOS 10.19 StepUpg","status":"affected"},{"version":"RoomOS 11.17.3.0","status":"affected"},{"version":"RoomOS 11.20.2.3","status":"affected"},{"version":"RoomOS 11.14.5.0","status":"affected"},{"version":"RoomOS 11.17.4.0","status":"affected"},{"version":"RoomOS 11.20.3.0","status":"affected"},{"version":"RoomOS 11.23.1.6","status":"affected"},{"version":"RoomOS 11.23.1.8","status":"affected"},{"version":"RoomOS 11.24.1.5","status":"affected"},{"version":"RoomOS 11.24.2.4","status":"affected"},{"version":"RoomOS 11.24.3.0","status":"affected"},{"version":"RoomOS 11.24.4.1","status":"affected"},{"version":"RoomOS 11.27.2.0","status":"affected"},{"version":"RoomOS 11.28.1.3","status":"affected"},{"version":"RoomOS 11.27.3.0","status":"affected"},{"version":"RoomOS 11.31.1.5","status":"affected"},{"version":"RoomOS 11.27.4.0","status":"affected"},{"version":"RoomOS 11.32.2.1","status":"affected"},{"version":"RoomOS 11.33.1.7","status":"affected"},{"version":"RoomOS 26.0.1.2","status":"affected"},{"version":"RoomOS 11.34.1.2","status":"affected"},{"version":"RoomOS 11.32.3.0","status":"affected"},{"version":"RoomOS 11.27.5.0","status":"affected"},{"version":"RoomOS 11.32.4.0","status":"affected"},{"version":"RoomOS 26.1.1.5","status":"affected"},{"version":"RoomOS 11.35.1.2","status":"affected"},{"version":"RoomOS 26.2.2.2","status":"affected"},{"version":"RoomOS 11.32.5.1","status":"affected"},{"version":"RoomOS 26.4.1.6","status":"affected"},{"version":"RoomOS 26.4.1.4","status":"affected"},{"version":"RoomOS 26.3.1.3","status":"affected"},{"version":"RoomOS 11.36.1.1","status":"affected"},{"version":"RoomOS 11.37.1.0","status":"affected"},{"version":"RoomOS 26.5.2.0","status":"affected"},{"version":"RoomOS 26.5.2.2","status":"affected"},{"version":"RoomOS 26.6.1.4","status":"affected"},{"version":"RoomOS 11.38.1.1","status":"affected"},{"version":"RoomOS 11.32.6.0","status":"affected"},{"version":"RoomOS 11.39.1.1","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-roomos-bof-vTMANZgu"],"weaknesses":["CWE-120"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20302.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20302","state":"PUBLISHED","datePublished":"2026-08-19T16:17:07.749Z","dateUpdated":"2026-08-20T15:57:08.625Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.408Z"},"containers":{"cna":{"title":"Cisco RoomOS Stack Overflow Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the USB driver of Cisco RoomOS could allow an unauthenticated, local attacker with physical access to the USB port on an affected device to execute arbitrary code with root privileges.\r\n\r\nThis vulnerability is due to insufficient boundary checks for specific data that is provided through the USB driver. An attacker could exploit this vulnerability by connecting a malicious USB device to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system and execute arbitrary code with root privileges."}],"affected":[{"vendor":"Cisco","product":"Cisco RoomOS Software","defaultStatus":"unknown","versions":[{"version":"RoomOS 10.11.2.2","status":"affected"},{"version":"RoomOS 10.15.2.2","status":"affected"},{"version":"RoomOS 11.5.4.6","status":"affected"},{"version":"RoomOS 11.5.2.4","status":"affected"},{"version":"RoomOS 10.8.2.5","status":"affected"},{"version":"RoomOS 10.11.5.2","status":"affected"},{"version":"RoomOS 10.11.3.0","status":"affected"},{"version":"RoomOS 10.15.5.3","status":"affected"},{"version":"RoomOS 10.19.2.2","status":"affected"},{"version":"RoomOS 11.1.3.1","status":"affected"},{"version":"RoomOS 10.11.6.0","status":"affected"},{"version":"RoomOS 10.19.3.0","status":"affected"},{"version":"RoomOS 10.19.4.2","status":"affected"},{"version":"RoomOS 10.3.2.4","status":"affected"},{"version":"RoomOS 10.3.4.0","status":"affected"},{"version":"RoomOS 10.15.3.0","status":"affected"},{"version":"RoomOS 11.1.4.1","status":"affected"},{"version":"RoomOS 11.14.2.3","status":"affected"},{"version":"RoomOS 11.1.2.4","status":"affected"},{"version":"RoomOS 10.8.3.1","status":"affected"},{"version":"RoomOS 11.14.2.1","status":"affected"},{"version":"RoomOS 10.3.3.0","status":"affected"},{"version":"RoomOS 10.8.4.0","status":"affected"},{"version":"RoomOS 10.15.4.1","status":"affected"},{"version":"RoomOS 10.19.5.6","status":"affected"},{"version":"RoomOS 10.11.4.1","status":"affected"},{"version":"RoomOS 11.9.3.1","status":"affected"},{"version":"RoomOS 11.5.3.3","status":"affected"},{"version":"RoomOS 10.3.2.0","status":"affected"},{"version":"RoomOS 11.9.2.4","status":"affected"},{"version":"RoomOS 11.14.3.0","status":"affected"},{"version":"RoomOS 11.17.2.2","status":"affected"},{"version":"RoomOS 11.14.4.0","status":"affected"},{"version":"RoomOS 10.19 StepUpg","status":"affected"},{"version":"RoomOS 11.17.3.0","status":"affected"},{"version":"RoomOS 11.20.2.3","status":"affected"},{"version":"RoomOS 11.14.5.0","status":"affected"},{"version":"RoomOS 11.17.4.0","status":"affected"},{"version":"RoomOS 11.20.3.0","status":"affected"},{"version":"RoomOS 11.23.1.6","status":"affected"},{"version":"RoomOS 11.23.1.8","status":"affected"},{"version":"RoomOS 11.24.1.5","status":"affected"},{"version":"RoomOS 11.24.2.4","status":"affected"},{"version":"RoomOS 11.24.3.0","status":"affected"},{"version":"RoomOS 11.24.4.1","status":"affected"},{"version":"RoomOS 11.27.2.0","status":"affected"},{"version":"RoomOS 11.28.1.3","status":"affected"},{"version":"RoomOS 11.27.3.0","status":"affected"},{"version":"RoomOS 11.31.1.5","status":"affected"},{"version":"RoomOS 11.27.4.0","status":"affected"},{"version":"RoomOS 11.32.2.1","status":"affected"},{"version":"RoomOS 11.33.1.7","status":"affected"},{"version":"RoomOS 26.0.1.2","status":"affected"},{"version":"RoomOS 11.34.1.2","status":"affected"},{"version":"RoomOS 11.32.3.0","status":"affected"},{"version":"RoomOS 11.27.5.0","status":"affected"},{"version":"RoomOS 11.32.4.0","status":"affected"},{"version":"RoomOS 26.1.1.5","status":"affected"},{"version":"RoomOS 11.35.1.2","status":"affected"},{"version":"RoomOS 26.2.2.2","status":"affected"},{"version":"RoomOS 11.32.5.1","status":"affected"},{"version":"RoomOS 26.4.1.6","status":"affected"},{"version":"RoomOS 26.4.1.4","status":"affected"},{"version":"RoomOS 26.3.1.3","status":"affected"},{"version":"RoomOS 11.36.1.1","status":"affected"},{"version":"RoomOS 11.37.1.0","status":"affected"},{"version":"RoomOS 26.5.2.0","status":"affected"},{"version":"RoomOS 26.5.2.2","status":"affected"},{"version":"RoomOS 26.6.1.4","status":"affected"},{"version":"RoomOS 11.38.1.1","status":"affected"},{"version":"RoomOS 11.32.6.0","status":"affected"},{"version":"RoomOS 11.39.1.1","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-roomos-bof-vTMANZgu","name":"cisco-sa-roomos-bof-vTMANZgu"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"PHYSICAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","lang":"en","description":"Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-08-19T16:17:07.749Z"},"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-roomos-bof-vTMANZgu","discovery":"EXTERNAL","defects":["CSCwu31332"]}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-20302","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-08-20T15:40:09.736009Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-20T15:57:08.625Z"}}]}}}