{"id":"CVE-2025-24985","kind":"vulnerability","aliases":["CVE-2025-24985"],"related":[],"title":"Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally","description":"Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.\n\nCISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","summary":"A integer overflow in the Windows Fast FAT File System driver lets an attacker run code locally. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2025-03-11T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.20947"],"affected":"< 10.0.10240.20947","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.7876"],"affected":"< 10.0.14393.7876","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.7009"],"affected":"< 10.0.17763.7009","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.5608"],"affected":"< 10.0.19044.5608","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.5608"],"affected":"< 10.0.19045.5608","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.5039"],"affected":"< 10.0.22621.5039","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":["10.0.22631.5039"],"affected":"< 10.0.22631.5039","ecosystem":"vendor"},{"name":"microsoft windows 11 24h2","fixed":["10.0.26100.3403"],"affected":"< 10.0.26100.3403","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.7876"],"affected":"< 10.0.14393.7876","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.7009"],"affected":"< 10.0.17763.7009","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.3270"],"affected":"< 10.0.20348.3270","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.1486"],"affected":"< 10.0.25398.1486","ecosystem":"vendor"},{"name":"microsoft windows server 2025","fixed":["10.0.26100.3403"],"affected":"< 10.0.26100.3403","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","microsoft","runtime","windows"],"not_affected_if":["non-windows-systems"],"how_to_check":null,"fix":"Apply the Microsoft patch for CVE-2025-24985 per vendor instructions; CISA says to discontinue use of the product if mitigations are unavailable.","status":"open","published_at":"2025-03-11T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:49:02+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T20:49:02Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft patch for CVE-2025-24985 per vendor instructions; CISA says to discontinue use of the product if mitigations are unavailable.","reach":"local","summary":"A integer overflow in the Windows Fast FAT File System driver lets an attacker run code locally. CISA lists it as actively exploited in the wild.","category":"runtime","who_cares":["windows","microsoft"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker gets code execution on the local Windows machine with the privileges of the driver.","analyst_note":"Find the Microsoft security update guide entry for CVE-2025-24985 to confirm affected Windows builds, fixed KB numbers, and whether a user must open a malicious file or USB device.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["non-windows-systems"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000427,"input_tokens":2543,"output_tokens":346,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':160C '-2025':19A,22A '-24985':20A,23A '10':28A,32A,36A,40A,44A '11':48A,52A,56A '1507':29A '1607':33A '1809':37A '2008':61A,65A '2012':69A,73A '2016':77A '2019':81A '2022':85A,89A '2025':94A '21h2':41A '22':159C '22h2':45A,49A '23h2':53A,90A '24h2':57A 'action':150C 'activ':120B 'allow':10A,140C 'appli':151C 'applic':157C 'attack':13A,112B,143C 'bod':158C 'cisa':116B,148C 'cloud':163C 'code':16A,114B,146C 'contain':132C 'cve':18A,21A 'discontinu':166C 'driver':9A,109B,131C 'execut':15A,145C 'exploit':95B,121B 'fast':7A,105B,127C 'fat':8A,106B,128C 'file':107B,129C 'follow':156C 'guidanc':161C 'instruct':155C 'integ':1A,100B,134C 'let':110B 'list':117B 'local':17A,115B,147C 'microsoft':24A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,74A,78A,82A,86A,91A,96B,125C 'mitig':152C,172C 'overflow':2A,101B,135C 'per':153C 'product':170C 'requir':149C 'run':113B 'runtim':97B 'server':60A,64A,68A,72A,76A,80A,84A,88A,93A 'servic':164C 'system':108B,130C 'unauthor':12A,142C 'unavail':174C 'use':167C 'vendor':154C 'vulner':138C 'wild':124B 'window':6A,98B,104B,126C 'windows':25A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A,71A,75A,79A,83A,87A,92A 'wraparound':4A,137C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-03-11T00:00:00+00:00","kev":{"dateAdded":"2025-03-11","dueDate":"2025-04-01","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.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2025-24985","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-24985","severity":null,"published_at":"2025-03-11T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T11:39:14+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-24985","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24985","severity":null,"published_at":"2025-03-11T17:16:34+00:00","modified_at":"2026-06-17T08:59:55+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}