{"id":"CVE-2014-0322","kind":"vulnerability","aliases":["CVE-2014-0322"],"related":[],"title":"Microsoft Internet Explorer: Microsoft Internet Explorer Use-After-Free Vulnerability","description":"Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.","summary":"Microsoft Internet Explorer has a use-after-free memory bug that lets a remote attacker run code. CISA lists it as exploited in the wild, and the EPSS exploitation probability is 0.851.","severity":"critical","cvss":9.3,"epss":0.85122,"exploited":true,"exploited_at":"2022-05-04T00:00:00+00:00","products":[{"name":"Microsoft Internet Explorer","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","internet-explorer","runtime","windows"],"not_affected_if":["no-internet-explorer-installed"],"how_to_check":null,"fix":"Apply updates per vendor instructions; the sources do not name the patched version or KB.","status":"open","published_at":"2014-02-14T16:55:07+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:39+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:17:39Z","model":"claude-haiku-5-5","output":{"fix":"Apply updates per vendor instructions; the sources do not name the patched version or KB.","reach":"internet","impact":"high","summary":"Microsoft Internet Explorer has a use-after-free memory bug that lets a remote attacker run code. CISA lists it as exploited in the wild, and the EPSS exploitation probability is 0.851.","category":"runtime","who_cares":["internet-explorer","windows"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs arbitrary code in the browser user's session","analyst_note":"Find affected and fixed IE versions and the Microsoft security bulletin for CVE-2014-0322 via the KEV and vendor advisory pages; sources give no version range.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-internet-explorer-installed"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00045,"input_tokens":2825,"output_tokens":334,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0322':14A,17A '-2014':13A,16A '0.851':59B '10':71C '2014':103C '9':69C 'allow':72C 'arbitrari':77C 'attack':42B,74C 'attribut':89C 'bug':37B 'cisa':45B 'cmarkup':85C 'code':44B,78C,84C 'craft':82C 'cve':12A,15A 'element':93C 'epss':55B 'execut':76C 'exploit':21B,49B,56B,95C 'explor':3A,6A,24B,29B,68C 'explorer':20A 'februari':102C 'free':10A,35B,63C 'internet':2A,5A,19A,23B,28B,67C 'internet-explor':22B 'involv':81C 'januari':100C 'javascript':83C 'let':39B 'list':46B 'memori':36B 'microsoft':1A,4A,18A,27B,66C 'onpropertychang':88C 'probabl':57B 'remot':41B,73C 'run':43B 'runtim':25B 'script':92C 'use':8A,33B,61C 'use-after-fre':7A,32B,60C 'vector':80C 'via':79C 'vulner':11A,64C 'wild':52B,98C 'window':26B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2014-02-14T16:55:07+00:00","kev":{"dateAdded":"2022-05-04","dueDate":"2022-05-25","requiredAction":"Apply updates per vendor instructions.","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-2014-0322","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2014-0322","severity":null,"published_at":"2022-05-04T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T16:39:48+00:00","note":null},{"source":"epss","external_id":"CVE-2014-0322","url":"https://api.first.org/data/v1/epss?cve=CVE-2014-0322","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2014-0322","url":"https://nvd.nist.gov/vuln/detail/CVE-2014-0322","severity":null,"published_at":"2014-02-14T16:55:07+00:00","modified_at":"2026-06-17T00:02:47+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}