{"id":"CVE-2024-38213","kind":"vulnerability","aliases":["CVE-2024-38213"],"related":[],"title":"Windows Mark of the Web Security Feature Bypass Vulnerability","description":"Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the SmartScreen user experience via a malicious file.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft Windows SmartScreen has a flaw that lets a malicious file bypass its warning prompts. An attacker who gets a user to open such a file can run software that SmartScreen would otherwise have flagged.","severity":"medium","cvss":6.5,"epss":null,"exploited":true,"exploited_at":"2024-08-13T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.20680"],"affected":"< 10.0.10240.20680","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.7070"],"affected":"< 10.0.14393.7070","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.5936"],"affected":"< 10.0.17763.5936","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.4529"],"affected":"< 10.0.19044.4529","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.4529"],"affected":"< 10.0.19045.4529","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.3019"],"affected":"< 10.0.22000.3019","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.3737"],"affected":"< 10.0.22621.3737","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":["10.0.22631.3737"],"affected":"< 10.0.22631.3737","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":["6.2.9200.24919"],"affected":"< 6.2.9200.24919","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.7070"],"affected":"< 10.0.14393.7070","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.5936"],"affected":"< 10.0.17763.5936","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.2522"],"affected":"< 10.0.20348.2522","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.950"],"affected":"< 10.0.25398.950","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2024-38213 per vendor instructions; CISA says to discontinue use of the product if mitigations are unavailable.","status":"open","published_at":"2024-08-13T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:58:25+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:58:25Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2024-38213 per vendor instructions; CISA says to discontinue use of the product if mitigations are unavailable.","reach":"local","impact":"medium","summary":"Microsoft Windows SmartScreen has a flaw that lets a malicious file bypass its warning prompts. An attacker who gets a user to open such a file can run software that SmartScreen would otherwise have flagged.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"no","worst_case":"Malicious file runs without SmartScreen warning, enabling further code execution","analyst_note":"Sources give no fixed Windows build or patch KB and no detection method; check Microsoft's CVE-2024-38213 advisory for affected versions and KB numbers.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000458,"input_tokens":2822,"output_tokens":352,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2024':11A,14A '-38213':12A,15A '10':20A,24A,28A,32A,36A '11':40A,44A,48A '1507':21A '1607':25A '1809':29A '2012':53A,57A '2016':61A '2019':65A '2022':69A,73A '21h2':33A,41A '22h2':37A,45A '23h2':49A,74A 'action':138C 'allow':123C 'appli':139C 'attack':94B,125C 'bypass':8A,89B,120C,127C 'cisa':136C 'contain':116C 'cve':10A,13A 'discontinu':145C 'experi':131C 'exploit':75B 'featur':7A,119C 'file':88B,103B,135C 'flag':112B 'flaw':83B 'get':96B 'infrastructur':76B 'instruct':143C 'let':85B 'malici':87B,134C 'mark':2A 'microsoft':16A,18A,22A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,78B,113C 'mitig':140C,151C 'open':100B 'otherwis':110B 'per':141C 'product':149C 'prompt':92B 'requir':137C 'run':105B 'secur':6A,118C 'server':52A,56A,60A,64A,68A,72A 'smartscreen':80B,108B,115C,129C 'softwar':106B 'unavail':153C 'use':146C 'user':98B,130C 'vendor':142C 'via':132C 'vulner':9A,121C 'warn':91B 'web':5A 'window':1A,77B,79B,114C 'windows':17A,19A,23A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A,71A 'would':109B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2024-08-13T00:00:00+00:00","kev":{"dateAdded":"2024-08-13","dueDate":"2024-09-03","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:N/I:H/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2024-38213","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-38213","severity":null,"published_at":"2024-08-13T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T10:39:05+00:00","note":null},{"source":"nvd","external_id":"CVE-2024-38213","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38213","severity":null,"published_at":"2024-08-13T18:15:30+00:00","modified_at":"2026-06-17T07:39:41+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"}