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CVE-2026-69784: Windows 10/11 allows local attackers to gain admin rights

CVE-2026-69784 · published 1 month ago

Summary

The Windows Hello sign‑in feature in the listed Windows 10 (21H2, 22H2) and Windows 11 (23H2, 24H2, 25H2) versions can be tricked into releasing memory it still needs. An attacker who already has access to the computer could use this mistake to raise their access level to that of an administrator, giving them full control of the system. Install the latest Windows updates from Microsoft as soon as they are available.

What to do

Update microsoft windows 10 version 21h2 to version 10.0.19044.7725 or later.
Update microsoft windows 10 version 22h2 to version 10.0.19045.7725 or later.
Update microsoft windows 11 version 23h2 to version 10.0.22631.7582 or later.
Update microsoft windows 11 version 24h2 to version 10.0.26100.9445 or later.
Update microsoft windows 11 version 25h2 to version 10.0.26200.9445 or later.
Update microsoft windows 11 version 26h1 to version 10.0.28000.2954 or later.
Update microsoft windows_10_21h2 to version 10.0.19044.7725 or later.
Update microsoft windows_10_22h2 to version 10.0.19045.7725 or later.
Update microsoft windows_11_23h2 to version 10.0.22631.7582 or later.
Update microsoft windows_11_24h2 to version 10.0.26100.9445 or later.
Update microsoft windows_11_25h2 to version 10.0.26200.9445 or later.
Update microsoft windows_11_26h1 to version 10.0.28000.2954 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows 10 version 21h2	< 10.0.19044.7725
microsoft	windows 10 version 22h2	< 10.0.19045.7725
microsoft	windows 11 version 23h2	< 10.0.22631.7582
microsoft	windows 11 version 24h2	< 10.0.26100.9445
microsoft	windows 11 version 25h2	< 10.0.26200.9445
microsoft	windows 11 version 26h1	< 10.0.28000.2954
microsoft	windows_10_21h2	< 10.0.19044.7725 `cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:*`
microsoft	windows_10_22h2	< 10.0.19045.7725 `cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:*`
microsoft	windows_11_23h2	< 10.0.22631.7582 `cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*`
microsoft	windows_11_24h2	< 10.0.26100.9445 `cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*`
microsoft	windows_11_25h2	< 10.0.26200.9445 `cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*`
microsoft	windows_11_26h1	< 10.0.28000.2954 `cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*`

Original advisory text

Windows Hello Elevation of Privilege Vulnerability

Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69784 vendor-advisory patch

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

8.8 High

Exploitation

<1% chance of attack within 30 days

Type

CWE-416Use After Free

Timeline

Published8 Sep 2026

Updated4 Nov 2026

First seen8 Sep 2026

Sources

CVE-2026-69784 · NVD

CVE-2026-69784 · MITRE

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