{"id":"CVE-2025-32706","kind":"vulnerability","aliases":["CVE-2025-32706"],"related":[],"title":"Improper input validation in Windows Common Log File System Driver allows an authorized attacker to elevate…","description":"Microsoft Windows Common Log File System (CLFS) Driver contains a heap-based buffer overflow 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 heap-based buffer overflow in the Windows Common Log File System (CLFS) driver lets a logged-in user raise their privileges on the machine. Exploitation in the wild is confirmed by CISA's Known Exploited Vulnerabilities catalog.","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":"= 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":["unpatched-build-not-in-use"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2025-32706 for your Windows version; CISA says to follow 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":"2026-10-23T20:48:36+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:48:36Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2025-32706 for your Windows version; CISA says to follow vendor mitigations or discontinue use if none exist.","reach":"local","summary":"A heap-based buffer overflow in the Windows Common Log File System (CLFS) driver lets a logged-in user raise their privileges on the machine. Exploitation in the wild is confirmed by CISA's Known Exploited Vulnerabilities catalog.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"A local low-privilege user gains SYSTEM-level control of the Windows machine.","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2025-32706 to confirm affected Windows builds, the patch KB numbers, and any detection method.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unpatched-build-not-in-use"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000445,"input_tokens":2559,"output_tokens":378,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':173C '-2025':18A,21A '-32706':19A,22A '10':27A,31A,35A,39A,43A '11':47A,51A,55A '1507':28A '1607':32A '1809':36A '2008':60A,64A '2012':68A '2016':72A '2019':76A '2022':80A,84A '2025':89A '21h2':40A '22':172C '22h2':44A,48A '23h2':52A,85A '24h2':56A 'action':163C 'allow':11A,153C 'appli':164C 'applic':170C 'attack':14A,156C 'author':13A,155C 'base':99B,148C 'bod':171C 'buffer':100B,149C 'catalog':135B 'cisa':130B,161C 'clfs':109B,142C 'cloud':176C 'common':6A,105B,138C 'confirm':128B 'contain':144C 'cve':17A,20A 'discontinu':179C 'driver':10A,110B,143C 'elev':16A,158C 'exploit':90B,123B,133B 'file':8A,107B,140C 'follow':169C 'guidanc':174C 'heap':98B,147C 'heap-bas':97B,146C 'host':94B 'improp':1A 'infrastructur':91B 'input':2A 'instruct':168C 'known':132B 'let':111B 'local':160C 'log':7A,106B,114B,139C 'logged-in':113B 'machin':122B 'microsoft':23A,25A,29A,33A,37A,41A,45A,49A,53A,57A,61A,65A,69A,73A,77A,81A,86A,136C 'mitig':165C,185C 'overflow':101B,150C 'per':166C 'privileg':119B,159C 'product':183C 'rais':117B 'requir':162C 'self':93B 'self-host':92B 'server':59A,63A,67A,71A,75A,79A,83A,88A 'servic':177C 'system':9A,108B,141C 'unavail':187C 'use':180C 'user':116B 'valid':3A 'vendor':167C 'vulner':134B,151C 'wild':126B 'window':5A,95B,104B,137C 'windows':24A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,74A,78A,82A,87A","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-2025-32706","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-32706","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":"2026-10-25T21:35:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-32706","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-32706","severity":null,"published_at":"2025-05-13T17:16:03+00:00","modified_at":"2026-06-17T09:12:27+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"}