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

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What is CVE-2026-85880?

CVE-2026-85880 is a vulnerability classified as Heap-based Buffer Overflow and Use of Uninitialized Resource, affecting Windows 10 Version 1607 (affected versions: 10.0.14393.0 – < 10.0.14393.9512), Windows 10 Version 1809 (affected versions: 10.0.17763.0 – < 10.0.17763.9245), Windows 10 Version 21H2 (affected versions: 10.0.19044.0 – < 10.0.19044.7725), and 10 more products. This vulnerability is rated High, with a CVSS score of 7.8. This vulnerability has been observed being exploited in the wild.

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Overview

Original source data

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

Affected products and scope

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Technical details

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Exploitability

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Technical impact

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Business impact

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Remediation

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Detection

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Sources (9)
GCVE / Vulnerability-Lookup
CVE Program
microsoft (CNA)
NVD
FIRST EPSS
CISA Known Exploited Vulnerabilities
known-exploited-vulnerabilities-catalog
Microsoft CSAF VEX
CVE-2026-85880
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Windows 10 Version 1607

Microsoft

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Windows 10 Version 1809

Microsoft

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Windows 10 Version 21H2

Microsoft

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