CVE-2025-26673: Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
First published: Tue Apr 08 2025(Updated: )
<p>Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.</p>
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Windows 11 | =22H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server | ||
| Windows 10 | =22H2 | |
| Windows 10 | =21H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2022 | ||
| Windows 10 | =21H2 | |
| Windows 10 | =22H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server | ||
| Windows 11 | =24H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2008 R2 | ||
| Windows 10 | =1809 | |
| Microsoft Windows Server 2008 R2 | ||
| Windows 11 | =22H2 | |
| Microsoft Windows Server 2019 | ||
| Windows 10 | =1607 | |
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =21H2 | |
| Windows 11 | =24H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =1809 | |
| Windows 10 | =1607 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Windows 10 | ||
| Windows 10 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-26673?
CVE-2025-26673 is considered a critical vulnerability due to its potential for causing denial of service.
How do I fix CVE-2025-26673?
To fix CVE-2025-26673, apply the relevant patches provided by Microsoft for your affected Windows version.
What products are affected by CVE-2025-26673?
CVE-2025-26673 affects various versions of Windows, including Windows 10, Windows 11, and several Windows Server editions.
Can CVE-2025-26673 be exploited remotely?
Yes, CVE-2025-26673 can be exploited by an unauthorized attacker over a network, leading to denial of service.
What are the risks of ignoring CVE-2025-26673?
Ignoring CVE-2025-26673 may result in significant service disruption and potential downtime for affected systems.
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/type
- agent/references
- collector/msrc-cve
- source/Microsoft
- agent/software-canonical-lookup
- agent/softwarecombine
- agent/first-publish-date
- collector/msrc
- collector/nvd-api
- source/NVD
- agent/author
- agent/weakness
- agent/last-modified-date
- agent/severity
- agent/source
- agent/description
- agent/tags
- agent/event
- vendor/microsoft
- canonical/windows 11
- version/windows 11/22h2
- version/windows 11/23h2
- canonical/microsoft windows server
- canonical/microsoft windows server 2016
- canonical/windows 10
- version/windows 10/22h2
- version/windows 10/21h2
- canonical/microsoft windows server 2022
- version/windows 11/24h2
- canonical/microsoft windows server 2019
- canonical/microsoft windows server 2025
- canonical/microsoft windows server 2008 r2
- version/windows 10/1809
- version/windows 10/1607
- canonical/microsoft windows server 2012 r2
- canonical/microsoft windows server 2022 23h2