Live › vulnerability › CVE-2026-85880
Go to dashboardHeap-based buffer overflow in Windows ALPC. Code running in a low-privilege AppContainer can escape the sandbox and gain SYSTEM locally, with no user interaction. Microsoft reports exploitation detected; it is not publicly disclosed. Fixed in the Sep 8 2026 updates. CVSS 7.8.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Windows | vendor | – | – |
| Windows 10 22H2/21H2 | vendor | >= 10.0.19044.0, < 10.0.19045.7725 | 10.0.19045.7725 |
| Windows 10 1607 / Windows Server 2016 | vendor | >= 10.0.14393.0, < 10.0.14393.9512 | 10.0.14393.9512 |
| Windows 10 1809 / Windows Server 2019 | vendor |
| >= 10.0.17763.0, < 10.0.17763.9245 |
| 10.0.17763.9245 |
| Windows Server 2012 R2 | vendor | < 6.3.9600.23398 | 6.3.9600.23398 |
| Windows Server 2012 | vendor | < 6.2.9200.26349 | 6.2.9200.26349 |
| microsoft windows 10 1607 | vendor | < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.7725 | 10.0.19044.7725 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.7725 | 10.0.19045.7725 |
| microsoft windows server 2012 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.9512 | 10.0.14393.9512 |
| microsoft windows server 2019 | vendor | < 10.0.17763.9245 | 10.0.17763.9245 |
| microsoft windows server 2022 | vendor | < 10.0.20348.5622 | 10.0.20348.5622 |
10.0.19045.7725, Server 2016/Win10 1607 10.0.14393.9512, Server 2012 R2 6.3.9600.23398, Server 2012 6.2.9200.26349Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.
CISA 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.
This page as .md · .json · in your agent: get_signal("CVE-2026-85880")
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