CVE-2025-49663
Published: 08 July 2025
Summary
CVE-2025-49663 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 29.3% 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-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mandates timely identification, reporting, and remediation of the specific heap-based buffer overflow flaw in RRAS through patching.
Implements memory protection mechanisms that prevent unauthorized code execution from heap buffer overflows exploited over the network.
Requires validation of network inputs to RRAS to ensure they are within acceptable ranges, preventing the malformed inputs that trigger the buffer overflow.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow enables unauthenticated RCE against the RRAS network service, directly mapping to exploitation of remote/public-facing services.
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-2025-49663 is a heap-based buffer overflow vulnerability, classified under CWE-122, affecting the Windows Routing and Remote Access Service (RRAS). Published on 2025-07-08, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
An unauthorized attacker can exploit this vulnerability over a network with low attack complexity and no required privileges, though it necessitates user interaction. Successful exploitation enables remote code execution, granting high levels of confidentiality, integrity, and availability impact within the affected scope.
Security practitioners should consult the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49663 for details on patches and mitigation guidance.
Details
- CWE(s)