Heap-based Buffer Overflow Vulnerability in Windows exFAT File System
CVE-2025-21180

7.8HIGH

Key Information:

Vendor
Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
11 March 2025

Summary

A security flaw exists in the Windows exFAT File System, where a heap-based buffer overflow can be exploited by unauthorized attackers. This vulnerability allows attackers to execute arbitrary code on affected systems, potentially leading to data breaches and unauthorized access. Proper mitigation and timely updates are crucial to safeguard systems from exploitation.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.20947

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.7876

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7009

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.