CVE tracker / CVE-2025-29954

CVE-2025-29954

CVE-2025-29954 is the Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability. Microsoft rates it Important, CVSS 5.9. It is not in CISA's Known Exploited Vulnerabilities catalog. Published May 13, 2025.

Risk summary

MediumDenial of Service

5.9

CVSS v3 base

1.5%

EPSS: chance of exploitation in 30 days

Medium

Severity

Important

Microsoft's rating

Unlikely

Microsoft: exploitation

In CISA KEV

Microsoft describes it: “Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.”

How to fix it

Microsoft lists 33 affected products and the update that fixes each:

KB5058379 · fixed build 10.0.19045.5854, 10.0.19044.5854
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
KB5058383 · fixed build 10.0.14393.8066
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
KB5058384 · fixed build 10.0.25398.1611
Windows Server 2022, 23H2 Edition (Server Core installation)
KB5058385 · fixed build 10.0.20348.3692
Windows Server 2022 (Server Core installation), Windows Server 2022
KB5058387 · fixed build 10.0.10240.21014
Windows 10 for x64-based Systems, Windows 10 for 32-bit Systems
KB5058392 · fixed build 10.0.17763.7314
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
KB5058403 · fixed build 6.3.9600.22577
Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2
KB5058405 · fixed build 10.0.22631.5335, 10.0.22621.5335
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
KB5058430 · fixed build 6.1.7601.27729
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
KB5058449 · fixed build 6.0.6003.23279
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
KB5058451 · fixed build 6.2.9200.25475
Windows Server 2012 (Server Core installation), Windows Server 2012

What Microsoft changed

September 9, 2025: Added an FAQ to provide a link to KB5066014—Netlogon RPC Hardening (CVE-2025-49716) - Microsoft Support . The article provides further guidance for hardening systems against unauthenticated RPC calls. This is an informational change only.
May 13, 2025: Information published.
August 7, 2025: Added an acknowledgement. This is an informational change only.

Details

Weakness: CWE-400: Uncontrolled Resource Consumption
Publicly disclosed (Microsoft): No
Exploited (Microsoft): No
Known exploited (CISA KEV): Not listed
Published: May 13, 2025
Last revised: September 9, 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.