SB2025011494 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Services

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Sensitive Data Storage in Improperly Locked Memory (CVE-ID: CVE-2025-21309)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to sensitive data storage in improperly locked memory in Windows Remote Desktop Services. A remote attacker can execute arbitrary code on the target system.

2) Resource exhaustion (CVE-ID: CVE-2025-21330)

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 Services. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

3) Use-after-free (CVE-ID: CVE-2025-21297)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Windows Remote Desktop Services. A remote attacker can execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21309
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21330
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21297