Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-85880

CVE-2026-85880HIGH

Microsoft Windows 10 Version 1607 — Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0362   89.1   YES

AFFECTED
  Product                                            Versions        Fixed
  Windows 10 Version 1607                            10.0.14393.0 –  —
  Windows 10 Version 1809                            10.0.17763.0 –  —
  Windows 10 Version 21H2                            10.0.19044.0 –  —
  Windows 10 Version 22H2                            10.0.19045.0 –  —
  Windows Server 2012                                6.2.9200.0 –    —
  Windows Server 2012 (Server Core installation)     6.2.9200.0 –    —
  Windows Server 2012 R2                             6.3.9600.0 –    —
  Windows Server 2012 R2 (Server Core installation)  6.3.9600.0 –    —
  Windows Server 2016                                10.0.14393.0 –  —
  Windows Server 2016 (Server Core installation)     10.0.14393.0 –  —
  + 3 more

TIMELINE
  Sep 4   Reserved by microsoft
  Sep 8   ADDED TO KEV — CVE-2026-85880 (Microsoft Windows 10 Version 1607). Remediation due September 22, 2026.
  Sep 8   Published (CNA: microsoft)
  Sep 23  DUE DATE PASSED — CVE-2026-85880 (Microsoft Windows 10 Version 1607). CISA remediation deadline was September 22, 2026; still in catalog.

CWE-122, CWE-908 · CNA: microsoft · CVSS v3.1 · 2 references · NVD status: Analyzed · KEV due September 22, 2026

Description

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

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 4, 2026	Reserved	Reserved by microsoft
September 8, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-85880 (Microsoft Windows 10 Version 1607). Remediation due September 22, 2026.
September 8, 2026	Published	Published (CNA: microsoft)
September 23, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-85880 (Microsoft Windows 10 Version 1607). CISA remediation deadline was September 22, 2026; still in catalog.

Affected

Affected products and packages — 13 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Windows 10 Version 1607	—	10.0.14393.0	—
Microsoft	Windows 10 Version 1809	—	10.0.17763.0	—
Microsoft	Windows 10 Version 21H2	—	10.0.19044.0	—
Microsoft	Windows 10 Version 22H2	—	10.0.19045.0	—
Microsoft	Windows Server 2012	—	6.2.9200.0	—
Microsoft	Windows Server 2012 (Server Core installation)	—	6.2.9200.0	—
Microsoft	Windows Server 2012 R2	—	6.3.9600.0	—
Microsoft	Windows Server 2012 R2 (Server Core installation)	—	6.3.9600.0	—
Microsoft	Windows Server 2016	—	10.0.14393.0	—
Microsoft	Windows Server 2016 (Server Core installation)	—	10.0.14393.0	—
Microsoft	Windows Server 2019	—	10.0.17763.0	—
Microsoft	Windows Server 2019 (Server Core installation)	—	10.0.17763.0	—
Microsoft	Windows Server 2022	—	10.0.20348.0	—

Weaknesses

CWE-122 · CWE-908

References (2)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880 [vendor-advisory, patch]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85880 [government-resource]

Authoritative record: CVE-2026-85880 at cve.org

Vendors: microsoft

Weaknesses: CWE-122 · CWE-908

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-85880 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.