{"id":"CVE-2025-59257","aliases":["EUVD-2025-34372","GHSA-37x9-hxcw-w9fv"],"status":"published","title":"Windows Local Session Manager (LSM) Denial of Service Vulnerability","description":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01535,"percentile":0.75174,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1287"],"published":"2025-10-14T17:00:44Z","modified":"2026-10-18T21:10:00Z","products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59257","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59257"},{"url":"https://github.com/advisories/GHSA-37x9-hxcw-w9fv"}],"sources":{"cve":[{"id":"CVE-2025-59257","title":"Windows Local Session Manager (LSM) Denial of Service Vulnerability","description":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.","status":"published","published":"2025-10-14T17:00:44.246Z","modified":"2026-02-22T17:24:52.363Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-1287"],"updated_at":"2026-11-02T14:32:47.812946Z"}],"euvd":[{"id":"EUVD-2025-34372","description":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.","status":"published","published":"2025-10-14T17:00:44Z","modified":"2026-02-22T17:24:52Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T19:48:36.125178Z"}],"ghsa":[{"id":"GHSA-37x9-hxcw-w9fv","title":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an...","description":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.","status":"published","published":"2025-10-14T18:30:35Z","modified":"2025-10-14T18:30:43Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-1287"],"updated_at":"2026-11-02T15:03:57.996157Z"}],"nvd":[{"id":"CVE-2025-59257","description":"Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.","status":"published","published":"2025-10-14T17:16:08.28Z","modified":"2026-10-18T21:10:00.12Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-1287"],"updated_at":"2026-11-02T14:11:38.17237Z"}]}}