{"id":"CVE-2019-1214","kind":"vulnerability","aliases":["CVE-2019-1214"],"related":[],"title":"Microsoft Windows: Microsoft Windows Privilege Common Log File System (CLFS) Escalation Vulnerability","description":"An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory, aka 'Windows Common Log File System Driver Elevation of Privilege Vulnerability'.","summary":"A flaw in the Windows Common Log File System (CLFS) driver mishandles objects in memory. A user who is already logged in on the machine can use it to gain higher privileges, such as SYSTEM.","severity":"high","cvss":7.8,"epss":0.01419,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows"],"not_affected_if":["fully-patched-windows"],"how_to_check":null,"fix":"Apply the Microsoft Windows updates for CVE-2019-1214 per vendor instructions, as CISA requires.","status":"open","published_at":"2019-09-11T22:15:14+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:41:34+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:41:34Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows updates for CVE-2019-1214 per vendor instructions, as CISA requires.","reach":"local","impact":"high","summary":"A flaw in the Windows Common Log File System (CLFS) driver mishandles objects in memory. A user who is already logged in on the machine can use it to gain higher privileges, such as SYSTEM.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user gains SYSTEM privileges on the Windows machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2019-1214 to confirm patched builds and a way to check installed KB updates.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["fully-patched-windows"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000446,"input_tokens":2834,"output_tokens":325,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2019-1214 to confirm patched builds and a way to check installed KB updates.","search":"'-1214':15A,18A '-2019':14A,17A 'aka':79C 'alreadi':43B 'clfs':10A,33B,72C 'common':6A,29B,68C,81C 'cve':13A,16A 'driver':34B,73C,85C 'elev':60C,86C 'escal':11A 'exist':64C 'exploit':21B 'file':8A,31B,70C,83C 'flaw':25B 'gain':53B 'handl':75C 'higher':54B 'improp':74C 'infrastructur':22B 'log':7A,30B,44B,69C,82C 'machin':48B 'memori':38B,78C 'microsoft':1A,3A,19A 'mishandl':35B 'object':36B,76C 'privileg':5A,55B,62C,88C 'system':9A,32B,58B,71C,84C 'use':50B 'user':40B 'vulner':12A,63C,89C 'window':2A,4A,23B,28B,67C,80C 'windows':20A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-09-11T22:15:14+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","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":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-1214","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1214","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T11:39:18+00:00","note":null},{"source":"epss","external_id":"CVE-2019-1214","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-1214","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-1214","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1214","severity":null,"published_at":"2019-09-11T22:15:14+00:00","modified_at":"2026-06-17T02:28:05+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T21:57:34+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"}