{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-0000eb201421","releaseDate":"2026-09-08T07:00:00-07:00","cveNumber":"CVE-2026-85880","cveTitle":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","releaseNumber":"2026-Sep","vulnType":"Security Vulnerability","latestRevisionDate":"2026-09-08T07:00:00-07:00","description":"<p>Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.</p>\n","cweList":["CWE-122: Heap-based Buffer Overflow","CWE-908: Use of Uninitialized Resource"],"cweDetailsListForSearch":["cwe: CWE-122: Heap-based Buffer Overflow","cweUrl: https://cwe.mitre.org/data/definitions/122.html","cwe: CWE-908: Use of Uninitialized Resource","cweUrl: https://cwe.mitre.org/data/definitions/908.html"],"unformattedDescription":"<p>Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.</p>","mitreText":"CVE-2026-85880","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-85880","publiclyDisclosed":"No","exploited":"Yes","latestSoftwareReleaseId":0,"latestSoftwareRelease":"Exploitation Detected","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"Windows ALPC","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000002,"impact":"Elevation of Privilege","langCode":"en-US","baseScore":"7.8","temporalScore":"6.8","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-122: Heap-based Buffer Overflow","https://cwe.mitre.org/data/definitions/122.html"]},{"keys":["cwe","cweUrl"],"values":["CWE-908: Use of Uninitialized Resource","https://cwe.mitre.org/data/definitions/908.html"]}],"articles":[{"title":"Windows ALPC Elevation of Privilege Vulnerability","articleType":"100000000","description":"<p>Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.</p>\n","ordinal":10000},{"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},{"articleType":"FAQ","description":"<p><strong>How could an attacker exploit this vulnerability?</strong></p>\n<p>An attacker who can execute code in a low-privilege AppContainer could exploit this vulnerability locally to escape the sandbox and elevate privileges on the affected system. No additional user interaction is required.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-85880","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":"7198da17-4ea9-f111-93a1-000d3ac5fb71"}]}