CVE-2026-50406

Published: Jul 14, 2026Modified: Jul 23, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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

Affected (12)

Products: Microsoft: Windows 10 21h2, Windows 10 22h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1

5 products

Windows 10 21h2

Windows 10 22h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Configuration A

12 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 21h2	Before 10.0.19044.7548
Microsoft Windows 10 21h2	Before 10.0.19044.7548
Microsoft Windows 10 21h2	Before 10.0.19044.7548
Microsoft Windows 10 22h2	Before 10.0.19045.7548
Microsoft Windows 10 22h2	Before 10.0.19045.7548
Microsoft Windows 10 22h2	Before 10.0.19045.7548
Microsoft Windows 11 24h2	Before 10.0.26100.8875
Microsoft Windows 11 24h2	Before 10.0.26100.8875
Microsoft Windows 11 25h2	Before 10.0.26200.8875
Microsoft Windows 11 25h2	Before 10.0.26200.8875
Microsoft Windows 11 26h1	Before 10.0.28000.2525
Microsoft Windows 11 26h1	Before 10.0.28000.2269

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50406

Source: secure@microsoft.com

PatchVendor Advisory

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