CVE-2025-26663: Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
Use after free in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to execute code over a network.
Other sources
Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.22523Patch KB5055557 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.0.6003.23220Patch KB5055596 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.1.7601.27670Patch KB5055570 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.25423Patch KB5055581 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.7969Patch KB5055521 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.25398.1551Patch KB5055527 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.3775Patch KB5055523 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.10240.20978Patch KB5055547 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.5189Patch KB5055528 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.5737Patch KB5055518 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.5737Patch KB5055518 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22621.5189Patch KB5055528 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.3453Patch KB5055526 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.7136Patch KB5055519
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-26663?
CVE-2025-26663 is considered a critical vulnerability that can allow unauthorized code execution over a network.
How do I fix CVE-2025-26663?
To fix CVE-2025-26663, apply the recommended patches provided by Microsoft for your affected Windows version.
Which versions of Windows are affected by CVE-2025-26663?
CVE-2025-26663 affects various versions including Windows 10, Windows 11, and multiple Windows Server editions.
What are the risks associated with CVE-2025-26663?
The risks include potential unauthorized access, data breaches, and remote code execution capabilities for attackers.
Is there a workaround for CVE-2025-26663 until a patch is applied?
Currently, the best practice is to apply the patch as soon as it is available; no specific workaround is recommended.