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High 7.8Known exploited (CISA KEV)Published Sep 8, 2026
CVE-2026-85880Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 1607 and 8 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 8, 2026; federal agencies had to remediate by Sep 22, 2026. Treat that date as your deadline.
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Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Weakness (CWE)
- CWE-122, CWE-908
- Known exploited
- Added to CISA KEV Sep 8, 2026; federal remediation due Sep 22, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 0.39% (percentile 33)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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