Skip to content
VulniPulse
Sign in
Advisory severityHigh7.8Microsoft Server Exploited CISA KEV

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

This high-severity Microsoft Server advisory covers CVE-2026-85880 affecting Windows Server 2019, Windows Server 2022, Windows Server 2016.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-85880 Source published Source updated

VulniPulse record published Record updated

CVE-2026-85880
Affected products & platforms
Microsoft ServerWindows Server
Open source advisory

Summary

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

Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2016; Windows Server 2012; and 1 more.

Affected products named by the advisory: Windows Server 2012 R2.

Is CVE-2026-85880 exploited?

Yes. CISA lists CVE-2026-85880 in its Known Exploited Vulnerabilities catalog (added ), which means CISA has evidence of exploitation in the wild.

How do I fix CVE-2026-85880?

Upgrade to a fixed release named by Microsoft:

  • KB5122876 (build 10.0.17763.9245)
  • KB5122882 (build 10.0.20348.5622)
  • KB5122878 (build 10.0.19045.7725)
  • KB5123099 (build 10.0.14393.9512)
  • KB5123065 (build 6.2.9200.26349)
  • KB5123066 (build 6.3.9600.23398)

Confirm against the vendor advisory before you patch.

CISA Known Exploited Vulnerability

Listed:
Sep 8, 2026 · federal remediation due Sep 22, 2026
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.

KEV is a prioritization signal from CISA. Remediation detail comes from the vendor advisory.

Affected versions
  • Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.9512
  • Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.9245
  • Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.7725
  • Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.7725
  • Windows Server 2012 6.2.9200.0 before 6.2.9200.26349
  • Windows Server 2012 (Server Core installation) 6.2.9200.0 before 6.2.9200.26349
  • Windows Server 2012 R2 6.3.9600.0 before 6.3.9600.23397
  • Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 before 6.3.9600.23397
  • Windows Server 2016 10.0.14393.0 before 10.0.14393.9512
  • Windows Server 2016 (Server Core installation) 10.0.14393.0 before 10.0.14393.9512
  • Windows Server 2019 10.0.17763.0 before 10.0.17763.9245
  • Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.9245

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • KB5122876 (build 10.0.17763.9245)
  • KB5122882 (build 10.0.20348.5622)
  • KB5122878 (build 10.0.19045.7725)
  • KB5123099 (build 10.0.14393.9512)
  • KB5123065 (build 6.2.9200.26349)
  • KB5123066 (build 6.3.9600.23398)

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Install the applicable security update for your platform: KB5122876, KB5122882, KB5122878, KB5123099, KB5123065, KB5123066 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Get an email when Windows Server publishes the next one.

See Windows Server's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Windows Server

More Microsoft Server advisories

All Microsoft Server advisories

iPhone and Android apps · New on the App Store

Monitor future Microsoft Server CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.