CVE-2025-54916: 
vulnerability analysis and mitigation

CVE-2025-54916 is a stack-based buffer overflow vulnerability in Windows NTFS (the default filesystem for all modern versions of Windows) that was disclosed on September 9, 2025. The vulnerability affects various versions of Windows including Windows 10, 11, Server 2008, 2012, 2016, 2019, 2022 and 2025. Microsoft has rated this vulnerability as 'important' with a CVSS base score of 7.8 (HIGH) (NVD, Talos).

The vulnerability is caused by a stack-based buffer overflow in Windows NTFS that allows an authorized attacker to execute code. The CVSS vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access is required with low attack complexity and privilege requirements (NVD). While the vulnerability is classified as a Remote Code Execution (RCE), it is not remotely exploitable over the network but requires an attacker to either have the ability to run code on the host or convince a user to run a malicious file (Krebs).

If successfully exploited, this vulnerability allows an authorized attacker to execute arbitrary code on the affected system with elevated privileges. The high CVSS score of 7.8 reflects the potential for complete compromise of system confidentiality, integrity, and availability (NVD).

Microsoft has released security updates to address this vulnerability as part of their September 2025 Patch Tuesday updates. Organizations are advised to apply the security updates to affected systems (Talos).