{"id":"CVE-2026-83657","aliases":[],"title":"Windows Modern Device Management (MDM) Tampering Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","products":[{"vendor":"Microsoft","name":"Windows 10 Version 1809","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"10.0.17763.0","status":"affected","lessThan":"10.0.17763.9376","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-83657"},{"vendor":"Microsoft","name":"Windows Server 2019","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","status":"affected","lessThan":"10.0.17763.9376","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-83657"},{"vendor":"Microsoft","name":"Windows Server 2019 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","status":"affected","lessThan":"10.0.17763.9376","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-83657"}],"remediation":[],"description":"Weak authentication in Windows Modern Device Management (MDM) allows an authorized attacker to perform tampering locally.","severity":"medium","score":5.5,"published":"2026-10-13T18:59:47.726Z","modified":"2026-10-28T18:11:29.642Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83657"],"sources":[{"name":"CVE","id":"CVE-2026-83657","modified":"2026-10-28T18:11:29.642Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-83657"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","score":5.5}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T19:55:31.817Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}