{"id":"CVE-2019-0863","kind":"vulnerability","aliases":["CVE-2019-0863"],"related":[],"title":"Microsoft Windows: Microsoft Windows Error Reporting (WER) Privilege Escalation Vulnerability","description":"Microsoft Windows Error Reporting (WER) contains a privilege escalation vulnerability due to the way it handles files, allowing for code execution in kernel mode.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Windows Error Reporting (WER) mishandles files, letting a local user escalate privileges. The sources say an attacker can run code in kernel mode.","severity":"high","cvss":7.8,"epss":0.05207,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft-windows","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft updates for this CVE per vendor instructions, as CISA requires; the sources do not name the patched build.","status":"open","published_at":"2019-05-16T19:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:41:40+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:41:40Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for this CVE per vendor instructions, as CISA requires; the sources do not name the patched build.","reach":"local","impact":"high","summary":"Microsoft Windows Error Reporting (WER) mishandles files, letting a local user escalate privileges. The sources say an attacker can run code in kernel mode.","category":"infrastructure","who_cares":["windows","microsoft-windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"Local user gains kernel-mode code execution and full system control","analyst_note":"Find the affected Windows builds and patch KB numbers in the Microsoft Security Response Center advisory for CVE-2019-0863, and confirm the local-only attack requirements.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00045,"input_tokens":2843,"output_tokens":332,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the affected Windows builds and patch KB numbers in the Microsoft Security Response Center advisory for CVE-2019-0863, and confirm the local-only attack requirements.","search":"'-0863':13A,16A '-2019':12A,15A 'action':75C 'allow':66C 'appli':76C 'attack':42B 'cisa':73C 'code':45B,68C 'contain':54C 'cve':11A,14A 'due':59C 'error':5A,27B,51C 'escal':9A,36B,57C 'execut':69C 'exploit':19B 'file':31B,65C 'handl':64C 'infrastructur':20B 'instruct':80C 'kernel':47B,71C 'let':32B 'local':34B 'microsoft':1A,3A,17A,22B,25B,49C 'microsoft-window':21B 'mishandl':30B 'mode':48B,72C 'per':78C 'privileg':8A,37B,56C 'report':6A,28B,52C 'requir':74C 'run':44B 'say':40B 'sourc':39B 'updat':77C 'user':35B 'vendor':79C 'vulner':10A,58C 'way':62C 'wer':7A,29B,53C 'window':2A,4A,23B,24B,26B,50C 'windows':18A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-05-16T19:29:00+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-2019-0863","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0863","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":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2019-0863","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-0863","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-2019-0863","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0863","severity":null,"published_at":"2019-05-16T19:29:00+00:00","modified_at":"2026-06-17T02:09:03+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"}