CVE tracker / CVE-2025-21376

CVE-2025-21376

CVE-2025-21376 is the Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability. Microsoft rates it Critical, CVSS 8.1. It is not in CISA's Known Exploited Vulnerabilities catalog. Published February 11, 2025.

Risk summary

HighRemote Code Execution

8.1

CVSS v3 base

9.3%

EPSS: chance of exploitation in 30 days

High

Severity

Critical

Microsoft's rating

More Likely

Microsoft: exploitation

In CISA KEV

How to fix it

Microsoft lists 37 affected products and the update that fixes each:

KB5051974 · fixed build 10.0.19045.5487, 10.0.19044.5487
Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, and 1 more
KB5051979 · fixed build 10.0.20348.3207
Windows Server 2022 (Server Core installation), Windows Server 2022
KB5051980 · fixed build 10.0.25398.1425
Windows Server 2022, 23H2 Edition (Server Core installation)
KB5051987 · fixed build 10.0.26100.3194
Windows Server 2025, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows Server 2025 (Server Core installation)
KB5051989 · fixed build 10.0.22631.4890, 10.0.22621.4890
Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 22H2 for x64-based Systems, Windows 11 Version 22H2 for ARM64-based Systems
KB5052000 · fixed build 10.0.17763.6893
Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 Version 1809 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems
KB5052006 · fixed build 10.0.14393.7785
Windows Server 2016 (Server Core installation), Windows Server 2016, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1607 for 32-bit Systems
KB5052016 · fixed build 6.1.7601.27566
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for x64-based Systems Service Pack 1
KB5052020 · fixed build 6.2.9200.25317
Windows Server 2012 (Server Core installation), Windows Server 2012
KB5052038 · fixed build 6.0.6003.23117
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation), Windows Server 2008 for x64-based Systems Service Pack 2, Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation), Windows Server 2008 for 32-bit Systems Service Pack 2
KB5052040 · fixed build 10.0.10240.20915
Windows 10 for x64-based Systems, Windows 10 for 32-bit Systems
KB5052042 · fixed build 6.3.9600.22417
Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2

What Microsoft changed

February 11, 2025: Information published.

Details

Weakness: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publicly disclosed (Microsoft): No
Exploited (Microsoft): No
Known exploited (CISA KEV): Not listed
Published: February 11, 2025
Last revised: February 11, 2025

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.