Vulnerability Intelligence Report
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
CVE-2026-85880
Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:3.62%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 < 10.0.19044.7725 (affected) |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 < 10.0.19045.7725 (affected) |
| Microsoft | Windows Server 2012 | 6.2.9200.0 < 6.2.9200.26349 (affected) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 < 6.2.9200.26349 (affected) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 < 6.3.9600.23398 (affected) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 < 6.3.9600.23398 (affected) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.9512 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.9245 (affected) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 < 10.0.20348.5622 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-09-04T18:18:19 |
| Published | 2026-09-08T17:14:21 |
| Patch Date | 2026-09-08 |
| Last Updated | 2026-09-25T21:34:09 |
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