{"id":"CVE-2023-32049","kind":"vulnerability","aliases":["CVE-2023-32049"],"related":[],"title":"Windows SmartScreen Security Feature Bypass Vulnerability","description":"Microsoft Windows Defender SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the Open File - Security Warning prompt.\n\nCISA required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","summary":"Microsoft Windows Defender SmartScreen has a flaw that lets an attacker skip the Open File - Security Warning prompt. Attackers get a file that runs without the usual warning, which is a common step in malware delivery.","severity":"high","cvss":8.8,"epss":null,"exploited":true,"exploited_at":"2023-07-11T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.6085"],"affected":"< 10.0.14393.6085","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.4645"],"affected":"< 10.0.17763.4645","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19041.3208"],"affected":"< 10.0.19041.3208","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.3208"],"affected":"< 10.0.19045.3208","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.2176"],"affected":"< 10.0.22000.2176","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.1992"],"affected":"< 10.0.22621.1992","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows","windows-endpoints"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2023-32049 per vendor instructions; if no update is available, discontinue use of the affected product (per CISA).","status":"open","published_at":"2023-07-11T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:57+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:04:57Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2023-32049 per vendor instructions; if no update is available, discontinue use of the affected product (per CISA).","reach":"unknown","impact":"medium","summary":"Microsoft Windows Defender SmartScreen has a flaw that lets an attacker skip the Open File - Security Warning prompt. Attackers get a file that runs without the usual warning, which is a common step in malware delivery.","category":"infrastructure","who_cares":["windows","windows-endpoints"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Malicious file opens without the security warning prompt, enabling further code execution","analyst_note":"Find the affected Windows builds and KB number in the Microsoft advisory for CVE-2023-32049 and confirm how the bypass is triggered.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000462,"input_tokens":2821,"output_tokens":360,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':8A,11A '-32049':9A,12A '10':17A,21A,25A,29A '11':33A,37A '1607':18A '1809':22A '2016':42A '2019':46A '2022':50A '21h2':26A,34A '22h2':30A,38A 'action':117C 'allow':104C 'appli':118C 'attack':67B,75B,106C 'bypass':5A,101C,108C 'cisa':115C 'common':88B 'contain':97C 'cve':7A,10A 'defend':59B,95C 'deliveri':92B 'discontinu':124C 'endpoint':56B 'exploit':51B 'featur':4A,100C 'file':71B,78B,111C 'flaw':63B 'get':76B 'infrastructur':52B 'instruct':122C 'let':65B 'malwar':91B 'microsoft':13A,15A,19A,23A,27A,31A,35A,39A,43A,47A,57B,93C 'open':70B,110C 'per':120C 'product':128C 'prompt':74B,114C 'requir':116C 'run':80B 'secur':3A,72B,99C,112C 'server':41A,45A,49A 'skip':68B 'smartscreen':2A,60B,96C 'step':89B 'unavail':132C 'updat':119C,130C 'use':125C 'usual':83B 'vendor':121C 'vulner':6A,102C 'warn':73B,84B,113C 'window':1A,53B,55B,58B,94C 'windows':14A,16A,20A,24A,28A,32A,36A,40A,44A,48A 'windows-endpoint':54B 'without':81B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-07-11T00:00:00+00:00","kev":{"dateAdded":"2023-07-11","dueDate":"2023-08-01","requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/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-2023-32049","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-32049","severity":null,"published_at":"2023-07-11T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-32049","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32049","severity":null,"published_at":"2023-07-11T18:15:13+00:00","modified_at":"2026-06-17T05:57:57+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"}