CVE-2025-50163
Published: 12 August 2025
Summary
CVE-2025-50163 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 46.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires timely identification, reporting, and correction of the heap-based buffer overflow flaw in RRAS to prevent exploitation.
Implements memory protections like non-executable heap memory and address space randomization to block successful exploitation of the RRAS heap buffer overflow.
Mandates validation of network inputs to the RRAS service to mitigate malformed data triggering the heap-based buffer overflow.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow in the publicly accessible Windows RRAS service directly enables remote arbitrary code execution (T1190 Exploit Public-Facing Application).
NVD Description
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
Deeper analysisAI
CVE-2025-50163 is a heap-based buffer overflow vulnerability in the Windows Routing and Remote Access Service (RRAS), published on 2025-08-12. The issue, associated with CWE-122 (Heap-based Buffer Overflow) and CWE-125 (Out-of-bounds Read), affects Windows systems running the RRAS component.
An unauthorized attacker can exploit this vulnerability over a network to execute arbitrary code. The CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates network accessibility with low attack complexity, no required privileges, but user interaction is needed, resulting in high impacts to confidentiality, integrity, and availability under an unchanged scope.
Microsoft's advisory provides details on mitigation and patches at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-50163.
Details
- CWE(s)