{"id":"CVE-2026-20931","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-20931","generatedAt":"2026-10-28T00:15:21.776Z","title":"External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.","description":"External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.","published":"2026-01-13T18:16:20.000Z","lastModified":"2026-07-30T21:17:10.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.1","score":8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-73"],"affected":["microsoft/windows 10 1607","microsoft/windows 10 1809","microsoft/windows 10 21h2","microsoft/windows 10 22h2","microsoft/windows 11 23h2","microsoft/windows 11 24h2","microsoft/windows 11 25h2","microsoft/windows server 2008","microsoft/windows server 2012","microsoft/windows server 2016","microsoft/windows server 2019","microsoft/windows server 2022","microsoft/windows server 2022 23h2","microsoft/windows server 2025"],"epss":{"score":0.00845,"percentile":0.57723,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20931","tags":["Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-20931-detection-script-elevation-of-privilege-vulnerability-in-windows-telephony-service","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-20931-mitigation-script-elevation-of-privilege-vulnerability-in-windows-telephony-service","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20931","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}