{"id":"CVE-2026-32202","kind":"vulnerability","aliases":["CVE-2026-32202"],"related":[],"title":"Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network","description":"Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network.\n\nCISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","summary":"A protection mechanism failure in the Windows Shell lets an unauthorized attacker perform spoofing over the network. CISA lists it as actively exploited in the wild.","severity":"medium","cvss":4.3,"epss":null,"exploited":true,"exploited_at":"2026-04-28T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.9060"],"affected":"< 10.0.14393.9060","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.8644"],"affected":"< 10.0.17763.8644","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.7184"],"affected":"< 10.0.19044.7184","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.7184"],"affected":"< 10.0.19045.7184","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":["10.0.22631.6936"],"affected":"< 10.0.22631.6936","ecosystem":"vendor"},{"name":"microsoft windows 11 24h2","fixed":["10.0.26100.8246"],"affected":"< 10.0.26100.8246","ecosystem":"vendor"},{"name":"microsoft windows 11 25h2","fixed":["10.0.26200.8246"],"affected":"< 10.0.26200.8246","ecosystem":"vendor"},{"name":"microsoft windows 11 26h1","fixed":["10.0.28000.1836"],"affected":"< 10.0.28000.1836","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.9060"],"affected":"< 10.0.14393.9060","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.8644"],"affected":"< 10.0.17763.8644","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.5020"],"affected":"< 10.0.20348.5020","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.2274"],"affected":"< 10.0.25398.2274","ecosystem":"vendor"},{"name":"microsoft windows server 2025","fixed":["10.0.26100.32690"],"affected":"< 10.0.26100.32690","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows","windows-shell"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the Microsoft mitigations or update for CVE-2026-32202 per vendor instructions; if mitigations are unavailable, discontinue use of the affected product (CISA required action).","status":"open","published_at":"2026-04-14T18:17:27+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:38:38+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-23T20:38:38Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft mitigations or update for CVE-2026-32202 per vendor instructions; if mitigations are unavailable, discontinue use of the affected product (CISA required action).","reach":"network","summary":"A protection mechanism failure in the Windows Shell lets an unauthorized attacker perform spoofing over the network. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","windows-shell"],"confidence":0.5,"needs_auth":"no","worst_case":"Attacker spoofs trusted Windows Shell content over the network, enabling further attacks.","analyst_note":"Find Microsoft's advisory for CVE-2026-32202 to confirm affected Windows builds, patch KB and any mitigation steps, and whether user interaction is needed.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000432,"input_tokens":2530,"output_tokens":357,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':150C '-2026':18A,21A '-32202':19A,22A '10':27A,31A,35A,39A '11':43A,47A,51A,55A '1607':28A '1809':32A '2012':60A,64A '2016':68A '2019':72A '2022':76A,80A '2025':85A '21h2':36A '22':149C '22h2':40A '23h2':44A,81A '24h2':48A '25h2':52A '26h1':56A 'action':140C 'activ':113B 'allow':7A,128C 'appli':141C 'applic':147C 'attack':10A,103B,131C 'bod':148C 'cisa':109B,138C 'cloud':153C 'contain':121C 'cve':17A,20A 'discontinu':156C 'exploit':86B,114B 'failur':3A,95B,125C 'follow':146C 'guidanc':151C 'infrastructur':87B 'instruct':145C 'let':100B 'list':110B 'mechan':2A,94B,124C 'microsoft':23A,25A,29A,33A,37A,41A,45A,49A,53A,57A,61A,65A,69A,73A,77A,82A,118C 'mitig':142C,162C 'network':16A,108B,137C 'per':143C 'perform':12A,104B,133C 'product':160C 'protect':1A,93B,123C 'requir':139C 'server':59A,63A,67A,71A,75A,79A,84A 'servic':154C 'shell':6A,91B,99B,120C 'spoof':13A,105B,134C 'unauthor':9A,102B,130C 'unavail':164C 'use':157C 'vendor':144C 'vulner':126C 'wild':117B 'window':5A,88B,90B,98B,119C 'windows':24A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,74A,78A,83A 'windows-shel':89B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-04-14T18:17:27+00:00","kev":{"dateAdded":"2026-04-28","dueDate":"2026-05-12","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, 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:L/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-32202","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-32202","severity":null,"published_at":"2026-04-28T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:21+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-32202","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32202","severity":null,"published_at":"2026-04-14T18:17:27+00:00","modified_at":"2026-08-14T17:17:51+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}