{"id":"CVE-2024-43573","kind":"vulnerability","aliases":["CVE-2024-43573"],"related":[],"title":"Windows MSHTML Platform Spoofing Vulnerability","description":"Microsoft Windows MSHTML Platform contains an unspecified spoofing vulnerability which can lead to a loss of confidentiality.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft Windows MSHTML Platform has a spoofing flaw that lets an attacker display misleading content to a user. CISA lists it as actively exploited in the wild, and the sources say the impact is loss of confidentiality.","severity":"high","cvss":8.1,"epss":null,"exploited":true,"exploited_at":"2024-10-08T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.20796"],"affected":"< 10.0.10240.20796","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.7428"],"affected":"< 10.0.14393.7428","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.6414"],"affected":"< 10.0.17763.6414","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.5011"],"affected":"< 10.0.19044.5011","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.5011"],"affected":"< 10.0.19045.5011","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.3260"],"affected":"< 10.0.22000.3260","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.4317"],"affected":"< 10.0.22621.4317","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":["10.0.22631.4317"],"affected":"< 10.0.22631.4317","ecosystem":"vendor"},{"name":"microsoft windows 11 24h2","fixed":["10.0.26100.2033"],"affected":"< 10.0.26100.2033","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.7428"],"affected":"< 10.0.14393.7428","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.6414"],"affected":"< 10.0.17763.6414","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.2762"],"affected":"< 10.0.20348.2762","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.1189"],"affected":"< 10.0.25398.1189","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows"],"not_affected_if":["non-windows"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2024-43573 per vendor instructions; if no mitigation is available, discontinue use of the affected product (per CISA).","status":"open","published_at":"2024-10-08T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:56:28+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:56:28Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2024-43573 per vendor instructions; if no mitigation is available, discontinue use of the affected product (per CISA).","reach":"unknown","impact":"medium","summary":"Microsoft Windows MSHTML Platform has a spoofing flaw that lets an attacker display misleading content to a user. CISA lists it as actively exploited in the wild, and the sources say the impact is loss of confidentiality.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker spoofs trusted UI content, leaking confidential information to the user","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2024-43573 to confirm affected Windows builds, the patch KB, and exploit delivery method.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["non-windows"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000464,"input_tokens":2811,"output_tokens":366,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2024':7A,10A '-43573':8A,11A '10':16A,20A,24A,28A,32A '11':36A,40A,44A,48A '1507':17A '1607':21A '1809':25A '2012':53A '2016':57A '2019':61A '2022':65A,69A '21h2':29A,37A '22h2':33A,41A '23h2':45A,70A '24h2':49A 'action':130C 'activ':96B 'appli':131C 'attack':85B 'cisa':92B,128C 'confidenti':110B,127C 'contain':115C 'content':88B 'cve':6A,9A 'discontinu':137C 'display':86B 'exploit':71B,97B 'flaw':81B 'impact':106B 'infrastructur':72B 'instruct':135C 'lead':122C 'let':83B 'list':93B 'loss':108B,125C 'microsoft':12A,14A,18A,22A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,74B,111C 'mislead':87B 'mitig':132C,143C 'mshtml':2A,76B,113C 'per':133C 'platform':3A,77B,114C 'product':141C 'requir':129C 'say':104B 'server':52A,56A,60A,64A,68A 'sourc':103B 'spoof':4A,80B,118C 'unavail':145C 'unspecifi':117C 'use':138C 'user':91B 'vendor':134C 'vulner':5A,119C 'wild':100B 'window':1A,73B,75B,112C 'windows':13A,15A,19A,23A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2024-10-08T00:00:00+00:00","kev":{"dateAdded":"2024-10-08","dueDate":"2024-10-29","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2024-43573","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-43573","severity":null,"published_at":"2024-10-08T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T20:35:33+00:00","note":null},{"source":"nvd","external_id":"CVE-2024-43573","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-43573","severity":null,"published_at":"2024-10-08T18:15:24+00:00","modified_at":"2026-06-17T07:51:19+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}