{"id":"CVE-2026-85880","aliases":["EUVD-2026-73365","GHSA-96fm-jjf3-wv64"],"status":"published","title":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00387,"percentile":0.33301,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-908"],"published":"2026-09-08T17:14:21Z","modified":"2026-10-31T16:13:02Z","kev":{"date_added":"2026-09-08","due_date":"2026-09-22","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-09-08"},{"source":"kev","since":"2026-09-08"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85880","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85880"},{"url":"https://github.com/advisories/GHSA-96fm-jjf3-wv64"}],"sources":{"cve":[{"id":"CVE-2026-85880","title":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:14:21.465Z","modified":"2026-11-10T21:33:06.868Z","cvss":[{"version":"3.1","score":7.8,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-122","CWE-908"],"updated_at":"2026-11-10T22:48:54.515847Z"}],"euvd":[{"id":"EUVD-2026-73365","description":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:14:21Z","modified":"2026-11-10T21:33:06Z","cvss":[{"version":"3.1","score":7.8,"vector":"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","level":"high"}],"exploited_since":"2026-09-08","updated_at":"2026-11-10T22:23:49.679186Z"}],"ghsa":[{"id":"GHSA-96fm-jjf3-wv64","title":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges...","description":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:33:39Z","modified":"2026-09-08T21:34:12Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:11:35.275364Z"}],"kev":[{"id":"CVE-2026-85880","title":"Microsoft Windows Heap-Based Buffer Overflow Vulnerability","description":"Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.","cwes":["CWE-122","CWE-908"],"kev":{"date_added":"2026-09-08","due_date":"2026-09-22","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-85880","description":"Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:21:14.087Z","modified":"2026-09-24T23:19:20.773Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122","CWE-908"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}