{"id":"CVE-2026-113766","aliases":["EUVD-2026-121931","GHSA-63r6-9gfj-q84r"],"status":"published","title":"Windows Language Experience Service Tampering Vulnerability","description":"Weak authentication in Windows Language Experience Service allows an authorized attacker to perform tampering locally.","severity":{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.003,"percentile":0.23087,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1390"],"published":"2026-11-10T18:18:49Z","modified":"2026-11-10T21:32:54Z","products":[{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows 11 version 26h2"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-113766","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113766"},{"url":"https://github.com/advisories/GHSA-63r6-9gfj-q84r"}],"sources":{"cve":[{"id":"CVE-2026-113766","title":"Windows Language Experience Service Tampering Vulnerability","description":"Weak authentication in Windows Language Experience Service allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-11-10T18:18:49.032Z","modified":"2026-11-13T18:07:39.245Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C","level":"low","assessor":"cna"}],"cwes":["CWE-1390"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-121931","description":"Weak authentication in Windows Language Experience Service allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-11-10T18:18:49Z","modified":"2026-11-13T18:07:39Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C","level":"low"}],"updated_at":"2026-11-10T23:24:33.201322Z"}],"ghsa":[{"id":"GHSA-63r6-9gfj-q84r","title":"Weak authentication in Windows Language Experience Service allows an authorized attacker to...","description":"Weak authentication in Windows Language Experience Service allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-11-10T21:32:47Z","modified":"2026-11-10T21:32:54Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"cwes":["CWE-1390"],"updated_at":"2026-11-10T21:57:50.285633Z"}],"nvd":[{"id":"CVE-2026-113766","description":"Weak authentication in Windows Language Experience Service allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-11-10T19:18:55.93Z","modified":"2026-11-10T21:18:54.333Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-1390"],"updated_at":"2026-11-11T00:21:54.23974Z"}]}}