CVE-2025-49753
Published: 08 July 2025
Summary
CVE-2025-49753 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-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 remediation of vulnerabilities like the heap-based buffer overflow in RRAS through patching.
Implements memory protections such as ASLR and DEP that directly mitigate exploitation of heap buffer overflows in services like RRAS.
Monitors and controls network communications to external interfaces, restricting unauthorized remote access to the vulnerable RRAS service.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow enables remote unauthenticated RCE against the RRAS service (remote access/VPN), directly mapping to exploitation of public-facing or remote 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-2025-49753, published on 2025-07-08, is a heap-based buffer overflow vulnerability (CWE-122) in the Windows Routing and Remote Access Service (RRAS). This flaw affects Windows systems where RRAS is enabled, allowing potential exploitation due to improper handling of heap memory.
An unauthorized attacker can exploit this vulnerability remotely over the network with low attack complexity and no required privileges, though user interaction is necessary. Successful exploitation enables arbitrary code execution, resulting in high confidentiality, integrity, and availability impacts, as reflected in its CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Mitigation details are available in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49753.
Details
- CWE(s)