{"id":"CVE-2022-21971","kind":"vulnerability","aliases":["CVE-2022-21971"],"related":[],"title":"Windows Runtime Remote Code Execution Vulnerability","description":"Microsoft Windows Runtime contains an unspecified vulnerability that allows for remote code execution.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Windows Runtime has an unspecified flaw that allows remote code execution. Listed in CISA's known-exploited catalog, so attackers are using it in real attacks.","severity":"critical","cvss":9.3,"epss":0.53781,"exploited":true,"exploited_at":"2022-08-18T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.2565"],"affected":"< 10.0.17763.2565","ecosystem":"vendor"},{"name":"microsoft windows 10 1909","fixed":["10.0.18363.2094"],"affected":"< 10.0.18363.2094","ecosystem":"vendor"},{"name":"microsoft windows 10 20h2","fixed":["10.0.19042.1526"],"affected":"< 10.0.19042.1526","ecosystem":"vendor"},{"name":"microsoft windows 10 21h1","fixed":["10.0.19043.1526"],"affected":"< 10.0.19043.1526","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.1526"],"affected":"< 10.0.19044.1526","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.493"],"affected":"< 10.0.22000.493","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.2565"],"affected":"< 10.0.17763.2565","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.524"],"affected":"< 10.0.20348.524","ecosystem":"vendor"},{"name":"microsoft windows server 20h2","fixed":["10.0.19042.1526"],"affected":"< 10.0.19042.1526","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft Windows updates per vendor instructions, as CISA requires; the sources do not name the patched build.","status":"open","published_at":"2022-02-09T17:15:08+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:11:00+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-23T21:11:00Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows updates per vendor instructions, as CISA requires; the sources do not name the patched build.","reach":"unknown","impact":"high","summary":"Microsoft Windows Runtime has an unspecified flaw that allows remote code execution. Listed in CISA's known-exploited catalog, so attackers are using it in real attacks.","category":"infrastructure","who_cares":["windows"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker runs code remotely on the Windows machine","analyst_note":"Find the patched Windows build and whether the attack needs a user action or network access; check Microsoft's CVE-2022-21971 advisory and the CISA KEV entry.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000446,"input_tokens":2816,"output_tokens":328,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':8A,11A '-21971':9A,12A '10':17A,21A,25A,29A,33A '11':37A '1809':18A '1909':22A '2019':42A '2022':46A '20h2':26A,50A '21h1':30A '21h2':34A,38A 'action':97C 'allow':62B,90C 'appli':98C 'attack':75B,81B 'catalog':73B 'cisa':68B,95C 'code':4A,64B,93C 'contain':85C 'cve':7A,10A 'execut':5A,65B,94C 'exploit':51B,72B 'flaw':60B 'infrastructur':52B 'instruct':102C 'known':71B 'known-exploit':70B 'list':66B 'microsoft':13A,15A,19A,23A,27A,31A,35A,39A,43A,47A,54B,82C 'per':100C 'real':80B 'remot':3A,63B,92C 'requir':96C 'runtim':2A,56B,84C 'server':41A,45A,49A 'unspecifi':59B,87C 'updat':99C 'use':77B 'vendor':101C 'vulner':6A,88C 'window':1A,53B,55B,83C 'windows':14A,16A,20A,24A,28A,32A,36A,40A,44A,48A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-02-09T17:15:08+00:00","kev":{"dateAdded":"2022-08-18","dueDate":"2022-09-08","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"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-2022-21971","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-21971","severity":null,"published_at":"2022-08-18T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T20:35:35+00:00","note":null},{"source":"epss","external_id":"CVE-2022-21971","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-21971","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-2022-21971","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21971","severity":null,"published_at":"2022-02-09T17:15:08+00:00","modified_at":"2026-06-17T04:27:22+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}