{"id":"CVE-2025-24985","published":"2025-03-11T17:16:34Z","modified":"2026-06-17T08:59:55Z","title":"Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.","provenance":"source","from":"NVD"},"summary":{"text":"An integer overflow or wraparound in the Fast FAT File System driver of Microsoft Windows lets an attacker corrupt memory and execute code. Exploitation requires local access, no privileges, and user interaction, such as opening or mounting a crafted FAT file system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:33Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.0389,"percentile":0.90214,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2025-03-11","dueDate":"2025-04-01","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24985 ; https://nvd.nist.gov/vuln/detail/CVE-2025-24985","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-03-11","exploitedFirstSeen":"2025-03-11","ransomware":false,"evidence":[{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Mar","date":"2025-03-11"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2025-03-11"},{"url":"https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-24985","date":"2025-03-11"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-03-11"},{"url":"https://swarm.ptsecurity.com/buried-in-the-log-exploiting-a-20-years-old-ntfs-vulnerability/","date":"2025-07-09"},{"url":"https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025","date":"2026-01-20"}],"evidenceTotal":6,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"}],"provenance":"machine"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"},{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24985","tags":["Patch","Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-detection-script","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-mitigation-script","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24985","tags":["US Government Resource"]}],"techniques":[{"id":"T1091","name":"Replication Through Removable Media","tactics":["initial-access","lateral-movement"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Integer Overflow","mappingType":"exploitation_technique","evidence":[],"comment":"An attacker can trick users into executing malicious code by mounting images or drives. This code exploits vulnerabilities in the Windows Fast FAT File System Driver.","confidence":"high"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Integer Overflow","mappingType":"primary_impact","evidence":[],"comment":"An attacker can trick users into executing malicious code by mounting images or drives. This code exploits vulnerabilities in the Windows Fast FAT File System Driver.","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2025-6321","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-6321","exploited":true,"exploitedSince":"2025-03-11","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2025-04-02","earliestUrl":"https://github.com/airbus-cert/cve-2025-24985","repos":[{"name":"airbus-cert/cve-2025-24985","url":"https://github.com/airbus-cert/cve-2025-24985","stars":2,"created":"2025-04-02"}]},"first":{"date":"2025-04-02","source":"PoC-in-GitHub","url":"https://github.com/airbus-cert/cve-2025-24985"},"provenance":"source"},"exploitRefs":["https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-detection-script"],"flow":[{"stage":"exploitation","techniques":["T1091"],"provenance":"source"},{"stage":"primary","techniques":["T1059"],"provenance":"source"}],"timeline":[{"date":"2025-03-11","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24985","provenance":"source"},{"date":"2025-03-11","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Mar","provenance":"source"},{"date":"2025-03-11","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2025-03-11","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-6321","provenance":"source"},{"date":"2025-04-02","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/airbus-cert/cve-2025-24985","provenance":"source"}],"speed":{"daysToPublicExploit":22,"firstExploitFrom":"PoC-in-GitHub","daysToKev":0},"priority":{"score":66.5,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 598 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":18.04,"detail":"percentile 0.9021"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-122"}}