{"id":"CVE-2026-108135","aliases":["EUVD-2026-100454","GHSA-wfr6-h9hr-j5vv"],"status":"published","title":"Windows Backup Engine Elevation of Privilege Vulnerability","description":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.003,"percentile":0.22975,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-59"],"published":"2026-10-13T19:01:45Z","modified":"2026-11-10T20:47:14Z","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_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_11_26h2"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108135","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108135"},{"url":"https://github.com/advisories/GHSA-wfr6-h9hr-j5vv"}],"sources":{"cve":[{"id":"CVE-2026-108135","title":"Windows Backup Engine Elevation of Privilege Vulnerability","description":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:45.274Z","modified":"2026-11-10T20:47:14.223Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-59"],"updated_at":"2026-11-10T22:18:25.731086Z"}],"euvd":[{"id":"EUVD-2026-100454","description":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:45Z","modified":"2026-11-10T20:47:14Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:55.284051Z"}],"ghsa":[{"id":"GHSA-wfr6-h9hr-j5vv","title":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an...","description":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T21:33:24Z","modified":"2026-10-13T21:33:25Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:13:13.272556Z"}],"nvd":[{"id":"CVE-2026-108135","description":"Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:18:03.96Z","modified":"2026-10-23T19:46:13.093Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:12:57.132005Z"}]}}