CVE-2012-4969
KEVMicrosoft Internet Explorer Use-After-Free Vulnerability
Description
Microsoft Internet Explorer contains a use-after-free vulnerability that allows remote attackers to execute code via a crafted web site.
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedSep 18, 2012
Last modifiedJun 16, 2026
Added to KEVJun 8, 2022
Remediation dueJun 22, 2022
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.rbBroken Link
- eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/Third Party Advisory
- technet.microsoft.com/security/advisory/2757760PatchVendor Advisory
- kb.cert.org/vuls/id/480095Third Party AdvisoryUS Government Resource
- securitytracker.com/id?1027538Third Party AdvisoryVDB Entry
- securityweek.com/new-internet-explorer-zero-day-being-exploited-wildThird Party Advisory
- us-cert.gov/cas/techalerts/TA12-255A.htmlThird Party AdvisoryUS Government Resource
- us-cert.gov/cas/techalerts/TA12-262A.htmlThird Party AdvisoryUS Government Resource
- us-cert.gov/cas/techalerts/TA12-265A.htmlThird Party AdvisoryUS Government Resource
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-4969US Government Resource
0 recent articles mention this CVE
79
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1588 days
- CVSS
- 8.1 HIGH
- EPSS (30-day exploit probability)
- 80.3% · top 1% of all CVEs
- Weakness
- CWE-416
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.