CVE-2014-0322
HighExploitedPublic exploitUse-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February…
Published Feb 14, 2014 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2014-0322 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Internet Explorer (Microsoft).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 14, 2014. Public exploit code is available.
- EPSS estimates a 85% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
85%
Higher than 99.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2014-0322 brief as a PDF
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Description
Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 4, 2022 | May 25, 2022 | Not reported |
| Industry KEV feed | Feb 14, 2014 | May 25, 2022 | Not reported |
| CIRCL KEV | May 4, 2022 | May 25, 2022 | Not reported |
| ENISA EUVD | May 4, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Internet ExplorerMicrosoft | 10, 9 | n/a |
Timeline
Publicly disclosed
Feb 14, 2014
Added to Industry KEV feed
Feb 14, 2014
Added to CISA KEV
May 4, 2022
Added to CIRCL KEV
May 4, 2022
Added to ENISA EUVD
May 4, 2022
Last updated
Apr 22, 2026
Weakness Type
- CWE-416 Use After Free
References
- advisoryVU#732479
- patchMS14-012
- patchhttp://technet.microsoft.com/security/advisory/2934088
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.
Affected: Internet Explorer (Microsoft) versions 10, 9. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 14, 2014.
Yes. It was added on May 4, 2022 with a federal remediation due date of May 25, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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