CVE-2026-85880
Description
Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
How to fix
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.
CISA due date: Sep 22, 2026- microsoft windows_10_160710.0.14393.9512 or later
- microsoft windows_10_180910.0.17763.9245 or later
- microsoft windows_10_21h210.0.19044.7725 or later
- microsoft windows_10_22h210.0.19045.7725 or later
- microsoft windows_server_201610.0.14393.9512 or later
- microsoft windows_server_201910.0.17763.9245 or later
- microsoft windows_server_202210.0.20348.5622 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows_10_1809 | v < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows_10_21h2 | v < 10.0.19044.7725 | 10.0.19044.7725 |
| microsoft windows_10_22h2 | v < 10.0.19045.7725 | 10.0.19045.7725 |
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows_server_2019 | v < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows_server_2022 | v < 10.0.20348.5622 | 10.0.20348.5622 |
Check your version
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Attack Surface Management
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