{"id":"CVE-2019-0703","kind":"vulnerability","aliases":["CVE-2019-0703"],"related":[],"title":"Microsoft Windows: Microsoft Windows SMB Information Disclosure Vulnerability","description":"An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, which could lead to information disclosure from the server.\n\nCISA required action: Apply updates per vendor instructions.","summary":"A flaw in how the Windows SMB Server handles certain requests lets an attacker read information from the server. CISA lists it as actively exploited in the wild.","severity":"medium","cvss":6.5,"epss":0.09385,"exploited":true,"exploited_at":"2022-05-23T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","file-servers","infrastructure","smb","windows"],"not_affected_if":["patched-windows","smb-disabled"],"how_to_check":null,"fix":"Apply the Microsoft update for CVE-2019-0703 per vendor instructions; exact KB numbers are not in the sources.","status":"open","published_at":"2019-04-09T00:29:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:34+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-23T21:17:34Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft update for CVE-2019-0703 per vendor instructions; exact KB numbers are not in the sources.","reach":"network","impact":"low","summary":"A flaw in how the Windows SMB Server handles certain requests lets an attacker read information from the server. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","smb","file-servers"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker reads sensitive information from the Windows server memory.","analyst_note":"Find the Microsoft advisory for CVE-2019-0703 to confirm affected Windows versions, patch KBs, and whether SMB exposure to the network is required.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["smb-disabled","patched-windows"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000452,"input_tokens":2827,"output_tokens":338,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0703':11A,14A '-2019':10A,13A 'action':79C 'activ':47B 'appli':80C 'attack':37B 'certain':33B,66C 'cisa':43B,77C 'could':69C 'cve':9A,12A 'disclosur':7A,54C,73C 'exist':56C 'exploit':17B,48B 'file':19B 'file-serv':18B 'flaw':25B 'handl':32B,65C 'inform':6A,39B,53C,72C 'infrastructur':21B 'instruct':84C 'lead':70C 'let':35B 'list':44B 'microsoft':1A,3A,15A 'per':82C 'read':38B 'request':34B,67C 'requir':78C 'server':20B,31B,42B,64C,76C 'smb':5A,22B,30B,63C 'updat':81C 'vendor':83C 'vulner':8A,55C 'way':59C 'wild':51B 'window':2A,4A,23B,29B,62C 'windows':16A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-04-09T00:29:00+00:00","kev":{"dateAdded":"2022-05-23","dueDate":"2022-06-13","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-0703","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0703","severity":null,"published_at":"2022-05-23T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2019-0703","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-0703","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-0703","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0703","severity":null,"published_at":"2019-04-09T00:29:00+00:00","modified_at":"2026-06-17T02:08:43+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}