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Recorded 20 Oct 2026 at 20:53 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.

CVEMicrosoft Security Response Center

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

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

What it said

CVE
CVE-2026-85880
Severity
Important
CVSS base score
7.8
CVSS vector
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
Impact
Elevation of Privilege
Exploitation detected
Yes
Publicly disclosed
No
Exploitability
Exploitation detected
Component
Windows ALPC
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Updates that fix it
KB5122876: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation) (restart required); KB5122878: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems (restart required); KB5122882: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5123065: Windows Server 2012, Windows Server 2012 (Server Core installation) (restart required); KB5123066: Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) (restart required); KB5123099: Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, Windows Server 2016 (Server Core installation) (restart required)
CISA KEV
Listed 8 Sep 2026; remediation due 22 Sep 2026
EPSS
3.6%; scored 20 Oct 2026
Public exploit code
No Nuclei template listed
Published
8 Sep 2026 07:00 UTC
Last revised
16 Sep 2026 07:00 UTC
Revision note
CVSS vector modified to correct the temporal Exploit Code Maturity setting. This is an informational change only.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 20 Oct 2026 at 20:53 UTC
CISA KEV
Complete at observationRead 20 Oct 2026 at 20:53 UTC
FIRST EPSS
Complete at observationRead 20 Oct 2026 at 20:53 UTC
Public detection templates (Nuclei)
Complete at observationRead 20 Oct 2026 at 20:53 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (8)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 20 Oct 2026 · 20:53:31 UTC EPSS3.6%; scored 19 Oct 2026 → 3.6%; scored 20 Oct 2026
  2. 19 Oct 2026 · 15:12:40 UTC EPSS3.6%; scored 18 Oct 2026 → 3.6%; scored 19 Oct 2026
  3. 18 Oct 2026 · 14:54:30 UTC EPSS3.6%; scored 16 Oct 2026 → 3.6%; scored 18 Oct 2026
  4. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  5. 16 Oct 2026 · 16:13:25 UTC EPSS3.6%; scored 15 Oct 2026 → 3.6%; scored 16 Oct 2026
  6. 15 Oct 2026 · 21:30:54 UTC EPSS3.6%; scored 14 Oct 2026 → 3.6%; scored 15 Oct 2026
  7. 15 Oct 2026 · 01:07:54 UTC EPSS3.6%; scored 13 Oct 2026 → 3.6%; scored 14 Oct 2026
  8. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 10 Nov 23:48 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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