{"id":"CVE-2013-3918","kind":"vulnerability","aliases":["CVE-2013-3918"],"related":[],"title":"The InformationCardSigninHelper Class ActiveX control in icardie.dll in Microsoft Windows XP SP2 and SP3, Windows…","description":"Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control, icardie.dll. An attacker could exploit the vulnerability by constructing a specially crafted webpage. When a user views the webpage, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.\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 out-of-bounds write in the InformationCardSigninHelper ActiveX control (icardie.dll) in Microsoft Windows lets a malicious webpage run code. An attacker gets the same user rights as the person viewing the page, and CISA lists it as exploited in the wild.","severity":"critical","cvss":9.3,"epss":null,"exploited":true,"exploited_at":"2025-10-06T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 7","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 8","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows rt","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows rt 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2003","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= sp2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows vista","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows xp","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["end-users","exploited","internet-explorer","other","windows"],"not_affected_if":["no-ie-activex","not-windows"],"how_to_check":"Check whether icardie.dll exists on Windows machines, for example with: dir %windir%\\system32\\icardie.dll\nCheck whether the InformationCard ActiveX control is registered for Internet Explorer.","fix":"Apply the vendor mitigation per Microsoft's advisory, or stop using the affected product.","status":"open","published_at":"2013-11-12T14:35:11+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:44:39+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T20:44:39Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation per Microsoft's advisory, or stop using the affected product.\nunknown","reach":"internet","summary":"A out-of-bounds write in the InformationCardSigninHelper ActiveX control (icardie.dll) in Microsoft Windows lets a malicious webpage run code. An attacker gets the same user rights as the person viewing the page, and CISA lists it as exploited in the wild.","category":"other","who_cares":["windows","internet-explorer","end-users"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code as the logged-in user after the victim views a malicious webpage.","analyst_note":"Sources give no fixed version or patch KB; confirm Microsoft's advisory and the EoL status of the affected Windows versions via the CISA KEV entry for CVE-2013-3918.","how_to_check":"Check whether icardie.dll exists on Windows machines, for example with: dir %windir%\\system32\\icardie.dll\nCheck whether the InformationCard ActiveX control is registered for Internet Explorer.\nunknown","needs_analyst":true,"not_affected_if":["not-windows","no-ie-activex"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000492,"input_tokens":2657,"output_tokens":453,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':210C '-2013':17A,20A '-3918':18A,21A '2003':43A '2008':47A,51A '2012':55A,59A '22':209C '7':26A '8':29A '8.1':32A,39A 'action':200C 'activex':4A,84B,132C 'allow':156C 'and/or':187C 'appli':201C 'applic':207C 'attack':97B,136C,161C 'bod':208C 'bound':79B,125C 'cisa':110B,198C 'class':3A,131C 'cloud':213C 'code':95B,158C 'construct':142C 'contain':120C 'control':5A,85B,133C 'could':137C,155C,167C,180C 'craft':145C 'current':175C 'cve':16A,19A 'discontinu':195C,216C 'end':67B,183C,189C 'end-of-lif':182C 'end-of-servic':188C 'end-us':66B 'eo':192C 'eol':186C 'execut':159C 'exploit':69B,114B,138C,164C 'explor':72B 'follow':206C 'gain':168C 'get':98B 'guidanc':211C 'icardie.dll':7A,86B,134C 'impact':178C 'informationcardsigninhelp':2A,83B,130C 'instruct':205C 'internet':71B 'internet-explor':70B 'let':90B 'life':185C 'list':111B 'malici':92B 'microsoft':9A,22A,24A,27A,30A,33A,36A,40A,44A,48A,52A,56A,60A,63A,88B,118C 'mitig':202C,222C 'out-of-bound':76B,122C 'page':108B 'per':203C 'person':105B 'product':179C,196C,220C 'remot':157C 'requir':199C 'right':102B,172C 'rt':35A,38A 'run':94B 'server':42A,46A,50A,54A,58A 'servic':191C,214C 'sp2':12A 'sp3':14A 'special':144C 'success':163C 'unavail':224C 'use':217C 'user':68B,101B,149C,171C,176C,193C 'util':197C 'vendor':204C 'view':106B,150C 'vista':62A 'vulner':127C,140C,154C,166C 'webpag':93B,146C,152C 'wild':117B 'window':10A,15A,74B,89B,119C 'windows':23A,25A,28A,31A,34A,37A,41A,45A,49A,53A,57A,61A,64A 'write':80B,126C 'xp':11A,65A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2013-11-12T14:35:11+00:00","kev":{"dateAdded":"2025-10-06","dueDate":"2025-10-27","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:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2013-3918","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-3918","severity":null,"published_at":"2025-10-06T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T10:39:04+00:00","note":null},{"source":"nvd","external_id":"CVE-2013-3918","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-3918","severity":null,"published_at":"2013-11-12T14:35:11+00:00","modified_at":"2026-06-16T23:56:01+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"}