SB2025040938 - Multiple vulnerabilities in Microsoft Windows Lightweight Directory Access Protocol (LDAP)

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2025-26673)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in Windows Lightweight Directory Access Protocol (LDAP). A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

2) Resource exhaustion (CVE-ID: CVE-2025-27469)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in Windows Lightweight Directory Access Protocol (LDAP). A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

3) Use-after-free (CVE-ID: CVE-2025-26663)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Windows Lightweight Directory Access Protocol (LDAP). A remote attacker can send specially crafted requests and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26673
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27469
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26663