CVE record · CVE-2026-69549

Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability

CVSS 7.0 HighEPSS 0.0031 · 24th percentile

Published by the CVE Program (CNA: microsoft) at 8 Sept 2026, 17:11 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
Vendor	Product	Versions
Microsoft	Windows 10 Version 1809	affected 10.0.17763.0 to before 10.0.17763.9245 custom
Microsoft	Windows 10 Version 21H2	affected 10.0.19044.0 to before 10.0.19044.7725 custom
Microsoft	Windows 10 Version 22H2	affected 10.0.19045.0 to before 10.0.19045.7725 custom
Microsoft	Windows 11 version 23H2	affected 10.0.22631.0 to before 10.0.22631.7582 custom
Microsoft	Windows 11 Version 23H2	affected 10.0.22631.0 to before 10.0.22631.7582 custom
Microsoft	Windows 11 Version 24H2	affected 10.0.26100.0 to before 10.0.26100.9445 custom
Microsoft	Windows 11 Version 25H2	affected 10.0.26200.0 to before 10.0.26200.9445 custom
Microsoft	Windows 11 version 26H1	affected 10.0.28000.0 to before 10.0.28000.2954 custom
Microsoft	Windows Server 2019	affected 10.0.17763.0 to before 10.0.17763.9245 custom
Microsoft	Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 to before 10.0.17763.9245 custom
Microsoft	Windows Server 2022	affected 10.0.20348.0 to before 10.0.20348.5622 custom
Microsoft	Windows Server 2025	affected 10.0.26100.0 to before 10.0.26100.33438 custom
Microsoft	Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 to before 10.0.26100.33438 custom

Identifiers: CVE-2026-69549
CNA: microsoft
Weakness (CWE): CWE-125 · CWE-200
Tags: Microsoft Windows 10 Version 1809
Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 version 23H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1
Microsoft Windows Server 2019
Memory corruption
Information disclosure
Published: 8 Sept 2026
Updated: 10 Nov 2026

Machine-written summary

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

Virtual Hard Disk (VHD) Miniport Driver in multiple Windows 10, Windows 11 and Windows Server 2019 builds is affected, as listed in the source. An attacker who already has an authorized local account can exploit an out-of-bounds read to elevate privileges. The source gives few details. Upgrade to the fixed builds listed for each affected version, such as 10.0.19045.7725 for Windows 10 Version 22H2.

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

Score	Rating	CVSS	Vector	Source
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 0.0031, the 24th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

8 Sept 2026, 17:11 UTC Confirmed by the CVE List
31 Oct 2026, 16:20 UTC First seen by agentprime

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69549 vendor-advisorypatch

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.