SB2025021193 - Multiple vulnerabilities in Microsoft Windows Core Messaging

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2025-21184)

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Windows Core Messaging. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Untrusted Pointer Dereference (CVE-ID: CVE-2025-21358)

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to untrusted pointer dereference in Windows Core Messaging. A local user can execute arbitrary code on the system with elevated privileges.

3) Heap-based buffer overflow (CVE-ID: CVE-2025-21414)

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Windows Core Messaging. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21184
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21358
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21414