{"id":"CVE-2021-1675","kind":"vulnerability","aliases":["CVE-2021-1675"],"related":[],"title":"Microsoft Windows: Microsoft Windows Print Spooler Remote Code Execution Vulnerability","description":"Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Windows Print Spooler has a remote code execution flaw, tracked as CVE-2021-1675. An attacker who can reach the spooler can run code on the affected Windows machine.","severity":"critical","cvss":9.3,"epss":0.85305,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","print-spooler","ransomware","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft update for CVE-2021-1675 per vendor instructions, as CISA requires.","status":"open","published_at":"2021-06-08T23:15:08+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:16+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:39:16Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft update for CVE-2021-1675 per vendor instructions, as CISA requires.","reach":"unknown","impact":"high","summary":"Microsoft Windows Print Spooler has a remote code execution flaw, tracked as CVE-2021-1675. An attacker who can reach the spooler can run code on the affected Windows machine.","category":"infrastructure","who_cares":["windows","print-spooler"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs code on the Windows machine with spooler exposure","analyst_note":"Sources give no affected or fixed versions and no check method; pull the Microsoft security update guide entry for CVE-2021-1675 to fill in versions and reach.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000451,"input_tokens":2825,"output_tokens":336,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Sources give no affected or fixed versions and no check method; pull the Microsoft security update guide entry for CVE-2021-1675 to fill in versions and reach.","search":"'-1675':13A,16A,40B '-2021':12A,15A,39B 'action':72C 'affect':53B 'allow':65C 'appli':73C 'attack':42B 'cisa':70C 'code':8A,33B,50B,68C 'contain':60C 'cve':11A,14A,38B 'execut':9A,34B,69C 'exploit':19B 'flaw':35B 'infrastructur':20B 'instruct':77C 'machin':55B 'microsoft':1A,3A,17A,26B,56C 'per':75C 'print':5A,22B,28B,58C 'print-spool':21B 'ransomwar':24B 'reach':45B 'remot':7A,32B,67C 'requir':71C 'run':49B 'spooler':6A,23B,29B,47B,59C 'track':36B 'unspecifi':62C 'updat':74C 'vendor':76C 'vulner':10A,63C 'window':2A,4A,25B,27B,54B,57C 'windows':18A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-06-08T23:15:08+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-1675","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-1675","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":"2026-10-25T17:39:59+00:00","note":null},{"source":"epss","external_id":"CVE-2021-1675","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-1675","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-1675","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1675","severity":null,"published_at":"2021-06-08T23:15:08+00:00","modified_at":"2026-08-12T05:17:31+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"}