CVE-2025-49757
Published: 12 August 2025
Summary
CVE-2025-49757 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 Exploitation of Remote Services (T1210); 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
Directly remediates the heap-based buffer overflow in Windows RRAS by requiring timely installation of vendor patches as specified in Microsoft's advisory.
Implements memory protection safeguards such as DEP and ASLR that directly mitigate heap-based buffer overflow exploits leading to remote code execution.
Requires validation of network inputs to RRAS to prevent malformed data from triggering the heap buffer overflow vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow in RRAS service directly enables remote code execution over the network without authentication.
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-2025-49757 is a heap-based buffer overflow vulnerability, classified under CWE-122, affecting the Windows Routing and Remote Access Service (RRAS). Published on 2025-08-12T18:15:31.143, 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) and enables an unauthorized attacker to execute code over a network.
The vulnerability can be exploited by an unauthorized attacker with network access, requiring low attack complexity and no privileges, though it necessitates user interaction. Successful exploitation grants high-impact confidentiality, integrity, and availability effects, culminating in remote code execution on the targeted Windows system running RRAS.
Microsoft's advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49757 provides details on patches and mitigation strategies for addressing this issue.
Details
- CWE(s)