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CVE-2026-85880Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

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

7.8 HIGHEPSS 0.38%⚡ Known Exploited (CISA KEV)NVD: Analyzed

OverviewAffected ProductsReferences
NVD CVE.org

Overview

Severity

ScoreSeverityVersionVector String
7.8HIGH3.1microsoft (CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8HIGH3.1microsoft (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

CISA required action

⚡ Known exploited · remediation due Sep 22, 2026

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.

Details

CVE ID
CVE-2026-85880
Status
Analyzed
Assigner (CNA)
microsoft
Published
Sep 8, 2026
Last modified
2026-10-31 16:13 UTC
Weaknesses
  • CWE-122 · Heap-based Buffer Overflow
  • CWE-908 · Use of Uninitialized Resource

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:13 UTC.