CVE-2025-24985Windows Fast FAT File System Driver Remote Code Execution Vulnerability
- 7.8HighCVSS base score
- 3.9%Exploitation in 30 daysEPSS · top 9.6% of all CVEs
- YesKnown exploitedin CISA's KEV since 11 Mar 2025
- YesPublic exploitsa reference or SSVC says so
Description
Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability.
- Added
- 11 Mar 2025
- Fix due (US federal)
- 1 Apr 2025
- Used by ransomware
- Not known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 11 Mar 2025.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By microsoft
- 40 days later
· 40 days later
Published
Added to CISA KEV
Known exploited in the wild
- 12 months later
· 12 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.9% · top 9.6% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
Microsoft · Windows 10 Version 1507
- affected 10.0.10240.0 – < 10.0.10240.20947
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.7876
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.7009
Microsoft · Windows 10 Version 21H2
- affected 10.0.19044.0 – < 10.0.19044.5608
Microsoft · Windows 10 Version 22H2
- affected 10.0.19045.0 – < 10.0.19045.5608
Microsoft · Windows 11 version 22H2
- affected 10.0.22621.0 – < 10.0.22621.5039
Microsoft · Windows 11 version 22H3
- affected 10.0.22631.0 – < 10.0.22631.5039
Microsoft · Windows 11 Version 23H2
- affected 10.0.22631.0 – < 10.0.22631.5039
Microsoft · Windows 11 Version 24H2
- affected 10.0.26100.0 – < 10.0.26100.3476
Microsoft · Windows Server 2008 R2 Service Pack 1
- affected 6.1.7601.0 – < 6.1.7601.27618
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- affected 6.1.7601.0 – < 6.1.7601.27618
Microsoft · Windows Server 2008 Service Pack 2
- affected 6.0.6003.0 – < 6.0.6003.23168
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)
- affected 6.0.6003.0 – < 6.0.6003.23168
Microsoft · Windows Server 2012
- affected 6.2.9200.0 – < 6.2.9200.25368
Microsoft · Windows Server 2012 (Server Core installation)
- affected 6.2.9200.0 – < 6.2.9200.25368
Microsoft · Windows Server 2012 R2
- affected 6.3.9600.0 – < 6.3.9600.22470
Microsoft · Windows Server 2012 R2 (Server Core installation)
- affected 6.3.9600.0 – < 6.3.9600.22470
Microsoft · Windows Server 2016
- affected 10.0.14393.0 – < 10.0.14393.7876
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.14393.0 – < 10.0.14393.7876
Microsoft · Windows Server 2019
- affected 10.0.17763.0 – < 10.0.17763.7009
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.17763.0 – < 10.0.17763.7009
Microsoft · Windows Server 2022
- affected 10.0.20348.0 – < 10.0.20348.3328
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)
- affected 10.0.25398.0 – < 10.0.25398.1486
Microsoft · Windows Server 2025
- affected 10.0.26100.0 – < 10.0.26100.3476
Microsoft · Windows Server 2025 (Server Core installation)
- affected 10.0.26100.0 – < 10.0.26100.3476
References
References4
- Windows Fast FAT File System Driver Remote Code Execution Vulnerability (opens in a new tab)vendor-advisorypatch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24985 (opens in a new tab)government-resource
- https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-mitigation-script (opens in a new tab)
- https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-detection-script (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-6321 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-24985)Record last updated .