{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-00001b7ef9dc","releaseDate":"2026-09-08T07:00:00-07:00","cveNumber":"CVE-2026-81963","cveTitle":"Windows Update Stack Elevation of Privilege Vulnerability","releaseNumber":"2026-Sep","vulnType":"Security Vulnerability","latestRevisionDate":"2026-09-08T07:00:00-07:00","description":"<p>Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.</p>\n","cweList":["CWE-59: Improper Link Resolution Before File Access ('Link Following')","CWE-284: Improper Access Control"],"cweDetailsListForSearch":["cwe: CWE-59: Improper Link Resolution Before File Access ('Link Following')","cweUrl: https://cwe.mitre.org/data/definitions/59.html","cwe: CWE-284: Improper Access Control","cweUrl: https://cwe.mitre.org/data/definitions/284.html"],"unformattedDescription":"<p>Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.</p>","mitreText":"CVE-2026-81963","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81963","publiclyDisclosed":"No","exploited":"Yes","latestSoftwareReleaseId":0,"latestSoftwareRelease":"Exploitation Detected","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"Windows Update Stack","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000002,"impact":"Elevation of Privilege","langCode":"en-US","baseScore":"7.8","temporalScore":"7.2","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-59: Improper Link Resolution Before File Access ('Link Following')","https://cwe.mitre.org/data/definitions/59.html"]},{"keys":["cwe","cweUrl"],"values":["CWE-284: Improper Access Control","https://cwe.mitre.org/data/definitions/284.html"]}],"articles":[{"articleType":"FAQ","description":"<p><strong>What privileges could be gained by an attacker who successfully exploited this vulnerability?</strong></p>\n<p>An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.</p>\n","ordinal":10000},{"title":"Windows Update Stack Elevation of Privilege Vulnerability","articleType":"100000000","description":"<p>Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-81963","version":1,"revisionDate":"2026-09-08T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"229c8867-86a5-f111-93a1-000d3ac5fb71"}]}