{"id":"CVE-2025-24993","kind":"vulnerability","aliases":["CVE-2025-24993"],"related":[],"title":"Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally","description":"Microsoft Windows New Technology File System (NTFS) contains a heap-based buffer overflow 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 heap-based buffer overflow in the Windows NTFS file system driver lets an unauthorized local user run code. It is listed 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","infrastructure","microsoft-windows","windows"],"not_affected_if":["non-windows-systems"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2025-24993 on affected Windows systems; the sources do not name the patched build.\nIf no patch can be applied, follow the CISA required action: apply vendor mitigations or discontinue use of the product.","status":"open","published_at":"2025-03-11T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:49:01+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:49:01Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2025-24993 on affected Windows systems; the sources do not name the patched build.\nIf no patch can be applied, follow the CISA required action: apply vendor mitigations or discontinue use of the product.","reach":"local","summary":"A heap-based buffer overflow in the Windows NTFS file system driver lets an unauthorized local user run code. It is listed as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","microsoft-windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"A local attacker with a low-privilege account runs code with higher privileges on the machine.","analyst_note":"Find the affected Windows builds and the patch KB from Microsoft's CVE-2025-24993 advisory, and confirm the exploitation details.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["non-windows-systems"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000436,"input_tokens":2544,"output_tokens":364,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':165C '-2025':18A,21A '-24993':19A,22A '10':27A,31A,35A,39A,43A '11':47A,51A,55A '1507':28A '1607':32A '1809':36A '2008':60A,64A '2012':68A,72A '2016':76A '2019':80A '2022':84A,88A '2025':93A '21h2':40A '22':164C '22h2':44A,48A '23h2':52A,89A '24h2':56A 'action':155C 'activ':124B 'allow':9A,145C 'appli':156C 'applic':162C 'attack':12A,148C 'base':3A,103B,140C 'bod':163C 'buffer':4A,104B,141C 'cisa':153C 'cloud':168C 'code':15A,119B,151C 'contain':136C 'cve':17A,20A 'discontinu':171C 'driver':112B 'execut':14A,150C 'exploit':94B,125B 'file':110B,133C 'follow':161C 'guidanc':166C 'heap':2A,102B,139C 'heap-bas':1A,101B,138C 'infrastructur':95B 'instruct':160C 'let':113B 'list':122B 'local':16A,116B,152C 'microsoft':23A,25A,29A,33A,37A,41A,45A,49A,53A,57A,61A,65A,69A,73A,77A,81A,85A,90A,97B,129C 'microsoft-window':96B 'mitig':157C,177C 'new':131C 'ntfs':8A,109B,135C 'overflow':5A,105B,142C 'per':158C 'product':175C 'requir':154C 'run':118B 'server':59A,63A,67A,71A,75A,79A,83A,87A,92A 'servic':169C 'system':111B,134C 'technolog':132C 'unauthor':11A,115B,147C 'unavail':179C 'use':172C 'user':117B 'vendor':159C 'vulner':143C 'wild':128B 'window':7A,98B,99B,108B,130C 'windows':24A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,74A,78A,82A,86A,91A","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-2025-24993","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-24993","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":"2026-10-25T17:39:55+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-24993","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24993","severity":null,"published_at":"2025-03-11T17:16:35+00:00","modified_at":"2026-09-24T13:10:00+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"}