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Vulnerabilities / CVE-2026-85880

CVE-2026-85880

Published 2026-09-08 · published (not yet in NVD)

CVE-2026-85880

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-09-08, with a fix-by date of 2026-09-22. Patch it first.

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.

7.8 HIGH
CVSS 3.1 · CNA
0.4%
chance of exploitation in the next 30 days (EPSS; higher than 32% of CVEs)

Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.

Scores

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:CCNA

Affected products

  • Microsoft Windows 10 Version 1607: 10.0.14393.0 to < 10.0.14393.9512
  • Microsoft Windows 10 Version 1809: 10.0.17763.0 to < 10.0.17763.9245
  • Microsoft Windows 10 Version 21H2: 10.0.19044.0 to < 10.0.19044.7725
  • Microsoft Windows 10 Version 22H2: 10.0.19045.0 to < 10.0.19045.7725
  • Microsoft Windows Server 2012: 6.2.9200.0 to < 6.2.9200.26349
  • Microsoft Windows Server 2012 (Server Core installation): 6.2.9200.0 to < 6.2.9200.26349
  • Microsoft Windows Server 2012 R2: 6.3.9600.0 to < 6.3.9600.23398
  • Microsoft Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 to < 6.3.9600.23398
  • Microsoft Windows Server 2016: 10.0.14393.0 to < 10.0.14393.9512
  • Microsoft Windows Server 2016 (Server Core installation): 10.0.14393.0 to < 10.0.14393.9512
  • Microsoft Windows Server 2019: 10.0.17763.0 to < 10.0.17763.9245
  • Microsoft Windows Server 2019 (Server Core installation): 10.0.17763.0 to < 10.0.17763.9245
  • Microsoft Windows Server 2022: 10.0.20348.0 to < 10.0.20348.5622

Weakness: CWE-122, CWE-908

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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