CVE DATABASE / CVE-2012-4969
CVE-2012-4969
Microsoft Internet Explorer Use-After-Free Vulnerability
CVSS 8.1 · HIGH
⚠ CISA KEV — ACTIVELY EXPLOITED
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2022-06-08.
Federal remediation due 2022-06-22.
Required action: Apply updates per vendor instructions.
Summary
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 3.1 breakdown
| Base score | 8.1 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Microsoft internet explorerMicrosoft windows server 2003Microsoft windows xpMicrosoft windows server 2008Microsoft windows vistaMicrosoft windows 7
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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
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-4969
Data: NIST NVD + CISA KEV. NVD last modified 2026-04-21. Always verify against the vendor advisory before acting.