PT-2025-28610 · Microsoft · Windows Fast Fat Driver+1

Jeongoh Ky + 3 · Published 2025-07-08 · Updated 2025-09-16 · CVE-2025-49721

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Windows Fast FAT Driver (affected versions not specified)

Description: The issue is related to a heap-based buffer overflow in the Windows Fast FAT Driver, which allows an unauthorized attacker to elevate privileges locally. This could potentially lead to increased access and control over the system by the attacker.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2025-08449

CVE-2025-49721

Affected Products

Windows

Windows Fast Fat Driver

References · 8

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-49721 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-49721 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49721 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-49721 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-49721 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/722772 · Security Note
• https://bdu.fstec.ru/vul/2025-08449 · Security Note
• https://twitter.com/CVEnew/status/1942958456723435997 · Twitter Post