CVE-2012-4969
Microsoft Internet Explorer Use-After-Free Vulnerability
- High 8.1
- Exploited: added to CISA KEV 8 Jun 2022
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.
Key facts
- Published
- 18 Sep 2012
- Last changed
- 22 Oct 2025
- Assigned by
- mitre
- KEV added
- 8 Jun 2022
- KEV fix due
- 22 Jun 2022
- EPSS
- 80.25% likely to be exploited in the next 30 days, higher than 99.625% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.1CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 18 Sep 2012 Published
- 8 Jun 2022 CVE-2012-4969 added to CISA KEV
- 8 Jun 2022 Added to the CISA KEV catalogue