{"cve_id":"CVE-2026-81963","published":"2026-09-08T18:21:00.090000+00:00","last_modified":"2026-09-09T05:18:17.173000+00:00","vuln_status":"Analyzed","description":"Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":7.8,"base_severity":"HIGH","attack_vector":"LOCAL","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-59","CWE-284"],"in_kev":true,"kev_date_added":"2026-09-08","kev_ransomware":false,"epss_score":0.00393,"epss_percentile":0.33541,"cap_rule_version":"0.1.1","stage":"PRIV_ESC","req_access":"USER","req_vector":"LOCAL","req_user_interaction":false,"grant_access":"PRIV","caps":["CODE_EXEC","PRIV_GAIN"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T12:31:26.753260+00:00","first_seen":"2026-09-08T18:21:00.090000+00:00","kev_first_seen":"2026-09-08T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":"2026-09-22T07:01:31.750503+00:00","vendors":["microsoft"],"products":["windows_11_23h2","windows_11_24h2","windows_11_25h2","windows_11_26h1","windows_server_2025"],"affected":[{"vendor":"microsoft","product":"windows_11_23h2","ranges":["< 10.0.22631.7582"]},{"vendor":"microsoft","product":"windows_11_24h2","ranges":["< 10.0.26100.9445"]},{"vendor":"microsoft","product":"windows_11_25h2","ranges":["< 10.0.26200.9445"]},{"vendor":"microsoft","product":"windows_11_26h1","ranges":["< 10.0.28000.2954"]},{"vendor":"microsoft","product":"windows_server_2025","ranges":["< 10.0.26100.33438"]}]}