CVE-2026-20871

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

U

se after free in Desktop Windows Manager allows an authorized attacker to elevate privileges locally.

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20871	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_10_21h2::::::::
	cpe:2.3:o:microsoft:windows_10_22h2::::::::
	cpe:2.3:o:microsoft:windows_11_23h2::::::::
	cpe:2.3:o:microsoft:windows_11_24h2::::::::
	cpe:2.3:o:microsoft:windows_11_25h2::::::::
	cpe:2.3:o:microsoft:windows_server_2022::::::::
	cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::
	cpe:2.3:o:microsoft:windows_server_2025::::::::

History

15 Jan 2026, 15:48

Type	Values Removed	Values Added
First Time		Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 25h2 Microsoft windows 11 23h2 Microsoft windows Server 2022 23h2 Microsoft windows 11 24h2 Microsoft windows Server 2022 Microsoft Microsoft windows Server 2025
CPE		cpe:2.3:o:microsoft:windows_11_25h2:::::::: cpe:2.3:o:microsoft:windows_server_2022:::::::: cpe:2.3:o:microsoft:windows_server_2025:::::::: cpe:2.3:o:microsoft:windows_server_2022_23h2:::::::: cpe:2.3:o:microsoft:windows_10_21h2:::::::: cpe:2.3:o:microsoft:windows_10_22h2:::::::: cpe:2.3:o:microsoft:windows_11_23h2:::::::: cpe:2.3:o:microsoft:windows_11_24h2::::::::
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20871 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20871 - Vendor Advisory

13 Jan 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-13 18:16

Updated : 2026-01-15 15:48

NVD link : CVE-2026-20871

Mitre link : CVE-2026-20871

CVE.ORG link : CVE-2026-20871

JSON object : View

Products Affected

CWE

CWE-416

Use After Free

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