CVE-2012-4969Use-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 expl…
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It affects microsoft internet_explorer. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jun 8, 2022; federal agencies had to remediate by Jun 22, 2022. Treat that date as your deadline.
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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.
- CVSS
- 8.1 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Added to CISA KEV Jun 8, 2022; federal remediation due Jun 22, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 80.25% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft internet_explorer microsoft:internet_explorer | 6; 7; 8; 9 | NVD |
References
- http://www.us-cert.gov/cas/techalerts/TA12-265A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://www.kb.cert.org/vuls/id/480095third-party-advisory, x-refsource-cert-vn, us-government-resource
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729vdb-entry, signature, x-refsource-oval, third-party-advisory
- http://www.us-cert.gov/cas/techalerts/TA12-262A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wildx-refsource-misc, third-party-advisory
- http://technet.microsoft.com/security/advisory/2757760x-refsource-confirm, patch, vendor-advisory
- http://www.us-cert.gov/cas/techalerts/TA12-255A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/x-refsource-misc, broken-link
- http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rbx-refsource-misc, broken-link
- http://www.securitytracker.com/id?1027538vdb-entry, x-refsource-sectrack, third-party-advisory
- http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/x-refsource-misc, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-4969us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.