{"id":"CVE-2026-108414","kind":"vulnerability","aliases":["CVE-2026-108414"],"related":[],"title":"Windows Projected File System driver: use-after-free lets a local user gain privileges","description":"Use after free in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.","summary":"A use-after-free bug in the Windows Projected File System filter driver lets a user who already has access to the machine escalate their privileges. Successful exploitation gives an attacker higher rights on the local Windows system.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","self-hosted","windows"],"not_affected_if":["no-local-access"],"how_to_check":"- Check the installed Windows build against Microsoft's security update guide entry for CVE-2026-108414\n- Check whether the Projected File System feature is enabled, which the sources do not say how to do; unknown","fix":null,"status":"open","published_at":"2026-11-10T19:18:12+00:00","first_seen_at":"2026-11-10T19:24:22+00:00","triaged_at":"2026-11-10T19:53:51+00:00","updated_at":"2026-11-10T19:53:51+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:53:51Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Projected File System driver: use-after-free lets a local user gain privileges","impact":"high","summary":"A use-after-free bug in the Windows Projected File System filter driver lets a user who already has access to the machine escalate their privileges. Successful exploitation gives an attacker higher rights on the local Windows system.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","self-hosted"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains SYSTEM-level privileges on the machine","analyst_note":"Confirm affected Windows builds, the Projected File System feature condition and the Microsoft patch from the MSRC entry for CVE-2026-108414.","how_to_check":"- Check the installed Windows build against Microsoft's security update guide entry for CVE-2026-108414\n- Check whether the Projected File System feature is enabled, which the sources do not say how to do; unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-local-access"],"who_is_affected":"Windows systems running the Projected File System feature are the ones the description covers, as the sources do not name a feature setting. Only machines where an attacker already has a local, authorized account are exposed. Sources do not say which Windows builds are affected.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000702,"input_tokens":4489,"output_tokens":507,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Windows builds, the Projected File System feature condition and the Microsoft patch from the MSRC entry for CVE-2026-108414.","search":"'-108414':18A,21A '-2026':17A,20A 'access':47B 'allow':76C 'alreadi':45B 'attack':58B,79C 'author':78C 'bug':32B 'cve':16A,19A 'driver':5A,40B,75C 'elev':81C 'escal':51B 'exploit':55B 'file':3A,37B,72C 'filter':39B,74C 'free':9A,31B,68C 'gain':14A 'give':56B 'higher':59B 'host':25B 'infrastructur':22B 'let':10A,41B 'local':12A,63B,83C 'machin':50B 'privileg':15A,53B,82C 'project':2A,36B,71C 'right':60B 'self':24B 'self-host':23B 'success':54B 'system':4A,38B,65B,73C 'use':7A,29B,66C 'use-after-fre':6A,28B 'user':13A,43B 'window':1A,26B,35B,64B,70C","nicknames":[],"mitigations":[],"who_affected":"Windows systems running the Projected File System feature are the ones the description covers, as the sources do not name a feature setting. Only machines where an attacker already has a local, authorized account are exposed. Sources do not say which Windows builds are affected.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","selfhosted","windows"],"campaign_type":null,"search_a":"'-108414':18A,21A '-2026':17A,20A 'cve':16A,19A 'driver':5A 'file':3A 'free':9A 'gain':14A 'let':10A 'local':12A 'privileg':15A 'project':2A 'system':4A 'use':7A 'use-after-fre':6A 'user':13A 'window':1A","search_b":"'access':47B 'alreadi':45B 'attack':58B 'bug':32B 'driver':40B 'escal':51B 'exploit':55B 'file':37B 'filter':39B 'free':31B 'give':56B 'higher':59B 'host':25B 'infrastructur':22B 'let':41B 'local':63B 'machin':50B 'privileg':53B 'project':36B 'right':60B 'self':24B 'self-host':23B 'success':54B 'system':38B,65B 'use':29B 'use-after-fre':28B 'user':43B 'window':26B,35B,64B","search_c":"'allow':76C 'attack':79C 'author':78C 'driver':75C 'elev':81C 'file':72C 'filter':74C 'free':68C 'local':83C 'privileg':82C 'project':71C 'system':73C 'use':66C 'window':70C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:12+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-108414","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108414","severity":null,"published_at":"2026-11-10T19:18:12+00:00","modified_at":"2026-11-10T19:18:12+00:00","first_seen_at":"2026-11-10T19:24:22+00:00","fetched_at":"2026-11-10T19:24:22+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}