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CVE record · CVE-2026-108465

Windows Update Delivery Optimization Elevation of Privilege Vulnerability

CVSS 7.0 HighEPSS 0.0028 · 20th percentile

Published by the CVE Program (CNA: microsoft) at 13 Oct 2026, 18:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Windows 10 Version 1809
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows 10 Version 21H2
  • affected 10.0.19044.0 to before 10.0.19044.7807 custom
Microsoft Windows 10 Version 22H2
  • affected 10.0.19045.0 to before 10.0.19045.7807 custom
Microsoft Windows 11 version 23H2
  • affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft Windows 11 Version 23H2
  • affected 10.0.22631.0 to before 10.0.22631.7652 custom
Microsoft Windows 11 Version 24H2
  • affected 10.0.26100.0 to before 10.0.26100.9711 custom
Microsoft Windows 11 Version 25H2
  • affected 10.0.26200.0 to before 10.0.26200.9711 custom
Microsoft Windows 11 version 26H1
  • affected 10.0.28000.0 to before 10.0.28000.3231 custom
Microsoft Windows 11 Version 26H2
  • affected 10.0.26300.0 to before 10.0.26300.9711 custom
Microsoft Windows Server 2019
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows Server 2019 (Server Core installation)
  • affected 10.0.17763.0 to before 10.0.17763.9376 custom
Microsoft Windows Server 2022
  • affected 10.0.20348.0 to before 10.0.20348.5761 custom
Microsoft Windows Server 2025
  • affected 10.0.26100.0 to before 10.0.26100.33650 custom
Microsoft Windows Server 2025 (Server Core installation)
  • affected 10.0.26100.0 to before 10.0.26100.33650 custom
Identifiers
CVE-2026-108465
CNA
microsoft
Weakness (CWE)
CWE-416
Tags
Published
13 Oct 2026
Updated
10 Nov 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Microsoft Windows Update Delivery Optimization, in Windows 10 versions 1809, 21H2 and 22H2, Windows 11 versions 23H2, 24H2, 25H2, 26H1 and 26H2, and Windows Server 2019, contains a use-after-free flaw. An attacker with local authorized access can exploit it to elevate privileges. The source gives few details. Upgrade to the fixed builds listed for your version: 10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807, 10.0.22631.7652, 10.0.26100.9711, 10.0.26200.9711, 10.0.28000.3231 or 10.0.26300.9711.

Written 10 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.0 High 3.1 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.0028, the 20th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 13 Oct 2026, 18:59 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 16:20 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.