CVE-2025-53720: 
vulnerability analysis and mitigation

A heap-based buffer overflow vulnerability was discovered in Windows Routing and Remote Access Service (RRAS), identified as CVE-2025-53720. The vulnerability was disclosed on August 12, 2025, affecting multiple versions of Microsoft Windows Server including Server 2008, 2012, 2016, 2019, 2022, and 2025 (NVD).

The vulnerability is classified as a heap-based buffer overflow (CWE-122) in the Windows Routing and Remote Access Service. Microsoft has assigned a CVSS v3.1 base score of 8.0 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H, indicating network vector, low attack complexity, low privileges required, and user interaction required (NVD).

If successfully exploited, this vulnerability allows an authorized attacker to execute arbitrary code over a network, potentially leading to full system compromise with high impacts on confidentiality, integrity, and availability of the affected system (NVD, Rapid7).

Microsoft has released security updates to address this vulnerability across affected Windows Server versions. Specific KB patches have been issued: KB5063906 for Server 2012, KB5063950 for Server 2012 R2, KB5063871 for Server 2016, KB5063877 for Server 2019, KB5063880 for Server 2022, KB5063899 for Server 2022 23H2, and KB5063878 for Server 2025 (Rapid7).