Microsoft Internet Explorer Use-After-Free Vulnerability

HIGH 8.1EXPLOITED (CISA KEV)CVE-2012-4969 · Published 18/09/2012 · updated 16/06/2026

Microsoft Internet Explorer Use-After-Free Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 08/06/2022. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
internet explorer microsoft	`= 6= 7= 8= 9`	No fix yet

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.

References

blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en · Broken Link
dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rb · Broken Link
eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet · Third Party Advisory
technet.microsoft.com/security/advisory/2757760 · Patch
kb.cert.org/vuls/id/480095 · Third Party Advisory
securitytracker.com/id · Third Party Advisory
securityweek.com/new-internet-explorer-zero-day-being-exploited-wild · Third Party Advisory
us-cert.gov/cas/techalerts/TA12-255A.html · Third Party Advisory
us-cert.gov/cas/techalerts/TA12-262A.html · Third Party Advisory
us-cert.gov/cas/techalerts/TA12-265A.html · Third Party Advisory
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729 · Third Party Advisory
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2012-4969

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