{"id":"CVE-2025-32701","kind":"vulnerability","aliases":["CVE-2025-32701"],"related":[],"title":"Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally","description":"Microsoft Windows Common Log File System (CLFS) Driver contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges 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 use-after-free bug in the Windows Common Log File System (CLFS) driver lets a logged-in user raise their privileges on the machine. CISA lists it as exploited in the wild.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2025-05-13T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.21014"],"affected":"< 10.0.10240.21014","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.8066"],"affected":"< 10.0.14393.8066","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.7314"],"affected":"< 10.0.17763.7314","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.5854"],"affected":"< 10.0.19044.5854","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.5854"],"affected":"< 10.0.19045.5854","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.5335"],"affected":"< 10.0.22621.5335","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":["10.0.22631.5335"],"affected":"< 10.0.22631.5335","ecosystem":"vendor"},{"name":"microsoft windows 11 24h2","fixed":["10.0.26100.3981"],"affected":"< 10.0.26100.3981","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":["10.0.14393.8066"],"affected":"< 10.0.14393.8066","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.7314"],"affected":"< 10.0.17763.7314","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.3692"],"affected":"< 10.0.20348.3692","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.1611"],"affected":"< 10.0.25398.1611","ecosystem":"vendor"},{"name":"microsoft windows server 2025","fixed":["10.0.26100.3981"],"affected":"< 10.0.26100.3981","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2025-32701 (version not stated in the sources); CISA says to apply vendor mitigations or discontinue use if none exist.","status":"open","published_at":"2025-05-13T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:48:35+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T20:48:35Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2025-32701 (version not stated in the sources); CISA says to apply vendor mitigations or discontinue use if none exist.","reach":"local","summary":"A use-after-free bug in the Windows Common Log File System (CLFS) driver lets a logged-in user raise their privileges on the machine. CISA lists it as exploited in the wild.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.7,"needs_auth":"yes","worst_case":"Local attacker with a normal account gains SYSTEM-level control of the Windows machine.","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2025-32701 for affected Windows builds, the patch KB numbers and any published mitigation.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000428,"input_tokens":2547,"output_tokens":347,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':173C '-2025':20A,23A '-32701':21A,24A '10':29A,33A,37A,41A,45A '11':49A,53A,57A '1507':30A '1607':34A '1809':38A '2008':62A,66A '2012':70A,74A '2016':78A '2019':82A '2022':86A,90A '2025':95A '21h2':42A '22':172C '22h2':46A,50A '23h2':54A,91A '24h2':58A 'action':163C 'allow':11A,153C 'appli':164C 'applic':170C 'attack':14A,156C 'author':13A,155C 'bod':171C 'bug':107B 'cisa':129B,161C 'clfs':115B,143C 'cloud':176C 'common':6A,111B,139C 'contain':145C 'cve':19A,22A 'discontinu':179C 'driver':10A,116B,144C 'elev':16A,158C 'exploit':96B,133B 'file':8A,113B,141C 'follow':169C 'free':3A,106B,150C 'guidanc':174C 'host':100B 'infrastructur':97B 'instruct':168C 'let':117B 'list':130B 'local':18A,160C 'log':7A,112B,120B,140C 'logged-in':119B 'machin':128B 'microsoft':25A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A,71A,75A,79A,83A,87A,92A,137C 'mitig':165C,185C 'per':166C 'privileg':17A,125B,159C 'product':183C 'rais':123B 'requir':162C 'self':99B 'self-host':98B 'server':61A,65A,69A,73A,77A,81A,85A,89A,94A 'servic':177C 'system':9A,114B,142C 'unavail':187C 'use':1A,104B,148C,180C 'use-after-fre':103B,147C 'user':122B 'vendor':167C 'vulner':151C 'wild':136B 'window':5A,101B,110B,138C 'windows':26A,28A,32A,36A,40A,44A,48A,52A,56A,60A,64A,68A,72A,76A,80A,84A,88A,93A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-05-13T00:00:00+00:00","kev":{"dateAdded":"2025-05-13","dueDate":"2025-06-03","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:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2025-32701","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-32701","severity":null,"published_at":"2025-05-13T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:22+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-32701","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-32701","severity":null,"published_at":"2025-05-13T17:16:02+00:00","modified_at":"2026-06-17T09:12:26+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"}