CVE-2025-24985
Published: March 11, 2025
Official Description
Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.
CISA KEV Advisory
Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability
Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This high-severity vulnerability in Microsoft Windows Fast FAT File System Driver involves an integer overflow or wraparound, which could allow an unauthorized attacker to execute code locally. While a CVSS score is not available, its inclusion in CISA's KEV catalog and an EPSS score of 0.00937 indicate a confirmed and notable exploitation risk.
This vulnerability has been actively exploited in the wild, as confirmed by its presence in CISA's Known Exploited Vulnerabilities catalog.
Apply the latest security updates from Microsoft to address this local code execution vulnerability. Regular patching of Windows systems is critical to prevent compromise.
Technical Analysis
CVE-2025-24985 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-24985 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-24985 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1