SB2025120971 - Multiple vulnerabilities in Microsoft Windows Routing and Remote Access Service (RRAS)

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2025-64678)

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

The vulnerability exists due to a boundary error in Windows Routing and Remote Access Service (RRAS). A remote attacker can trick a victim into sending a request to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

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

2) Untrusted Pointer Dereference (CVE-ID: CVE-2025-62549)

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

The vulnerability exists due to untrusted pointer dereference in Windows Routing and Remote Access Service (RRAS). A remote attacker can trick a victim into sending a request to a malicious server and execute arbitrary code on the system.

3) Out-of-bounds read (CVE-ID: CVE-2025-62473)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in Windows Routing and Remote Access Service (RRAS). A remote attacker can wait for a user to initiate a connection to a malicious server, trigger an out-of-bounds read error and read contents of memory on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-64678
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-62549
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-62473