SB2025051378 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Gateway (RD Gateway)

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2025-26677)

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 Remote Desktop Gateway (RD Gateway). A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

2) Sensitive Data Storage in Improperly Locked Memory (CVE-ID: CVE-2025-30394)

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

The vulnerability exists due to sensitive data storage in improperly locked memory in Windows Remote Desktop Gateway (RD Gateway). A remote attacker can win a race condition and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-26677
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-30394
• https://www.zerodayinitiative.com/advisories/ZDI-25-334/