{"id":"CVE-2012-4969","kind":"vulnerability","aliases":["CVE-2012-4969"],"related":[],"title":"Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through…","description":"Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.","summary":"Microsoft Internet Explorer has a use-after-free memory bug that lets a remote attacker run code by getting a user to visit a crafted web page. It is listed in CISA's known-exploited catalog, so attacks have been seen in the wild.","severity":"critical","cvss":9.3,"epss":0.8025,"exploited":true,"exploited_at":"2022-06-08T00:00:00+00:00","products":[{"name":"Microsoft Internet Explorer","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 6","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 7","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 8","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 9","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browser","exploited","internet-explorer","runtime","windows"],"not_affected_if":["no-internet-explorer-installed","patched-systems"],"how_to_check":"Check whether Internet Explorer is installed and which version: look at Help > About Internet Explorer or the IE version registry value. unknown for fleet-wide checks in the sources.","fix":"Apply the Microsoft security updates for Internet Explorer per vendor instructions (CISA required action). Move users off unsupported IE versions where possible.","status":"open","published_at":"2012-09-18T10:39:14+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:12:56+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-23T21:12:56Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security updates for Internet Explorer per vendor instructions (CISA required action). Move users off unsupported IE versions where possible.","reach":"internet","impact":"high","summary":"Microsoft Internet Explorer has a use-after-free memory bug that lets a remote attacker run code by getting a user to visit a crafted web page. It is listed in CISA's known-exploited catalog, so attacks have been seen in the wild.","category":"runtime","who_cares":["internet-explorer","windows","browser"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code as the logged-in user after a victim visits a malicious site.","analyst_note":"Confirm the specific patched IE versions and the Microsoft bulletin ID from the CISA or Microsoft advisory; sources give no version or fix detail.","how_to_check":"Check whether Internet Explorer is installed and which version: look at Help > About Internet Explorer or the IE version registry value. unknown for fleet-wide checks in the sources.","needs_analyst":true,"not_affected_if":["no-internet-explorer-installed","patched-systems"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000499,"input_tokens":2834,"output_tokens":432,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2012':19A,22A '-4969':20A,23A '2012':130C '6':17A,108C '9':110C 'allow':111C 'arbitrari':116C 'attack':61B,85B,113C 'browser':39B 'bug':56B 'catalog':83B 'cisa':78B 'cmshtmled':8A,99C 'code':63B,117C 'craft':71B,120C 'cve':18A,21A 'exec':9A,100C 'execut':115C 'exploit':40B,82B,124C 'explor':16A,43B,48B,107C 'explorer':26A,29A,32A,35A,38A 'free':4A,54B,95C 'function':10A,101C 'get':65B 'internet':15A,25A,28A,31A,34A,37A,42B,47B,106C 'internet-explor':41B 'known':81B 'known-exploit':80B 'let':58B 'list':76B 'memori':55B 'microsoft':14A,24A,27A,30A,33A,36A,46B,105C 'mshtml.dll':12A,103C 'page':73B 'remot':60B,112C 'run':62B 'runtim':44B 'seen':88B 'septemb':129C 'site':122C 'use':2A,52B,93C 'use-after-fre':1A,51B,92C 'user':67B 'via':118C 'visit':69B 'vulner':5A,96C 'web':72B,121C 'wild':91B,127C 'window':45B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2012-09-18T10:39:14+00:00","kev":{"dateAdded":"2022-06-08","dueDate":"2022-06-22","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2012-4969","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2012-4969","severity":null,"published_at":"2022-06-08T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T13:39:31+00:00","note":null},{"source":"epss","external_id":"CVE-2012-4969","url":"https://api.first.org/data/v1/epss?cve=CVE-2012-4969","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-2012-4969","url":"https://nvd.nist.gov/vuln/detail/CVE-2012-4969","severity":null,"published_at":"2012-09-18T10:39:14+00:00","modified_at":"2026-06-16T23:45:58+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"}