CVE-2012-4969: Microsoft Internet Explorer Use-After-Free Vulnerability

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: yes — in CISA KEV since 2022-06-08
EPSS: 80.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-09-18 · updated 2026-06-16
Weakness: CWE-416

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.

Affected products

Microsoft Internet Explorer 11: 6, 7, 8, 9

References

http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/
http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rb
http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/
http://technet.microsoft.com/security/advisory/2757760
http://www.kb.cert.org/vuls/id/480095
http://www.securitytracker.com/id?1027538
http://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wild
http://www.us-cert.gov/cas/techalerts/TA12-255A.html
http://www.us-cert.gov/cas/techalerts/TA12-262A.html
http://www.us-cert.gov/cas/techalerts/TA12-265A.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729
http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/

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