# CVE-2014-0322: Microsoft Internet Explorer Use-After-Free Vulnerability

Source: https://junglewise.ai/threats/cve-2014-0322-microsoft-internet-explorer-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-04. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2014-0322 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-04

A use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code. The flaw is triggered via crafted JavaScript code involving CMarkup and the onpropertychange attribute of a script element.

Technologies: [Microsoft Edge](https://junglewise.ai/threats/technologies/edge), [Microsoft Internet Explorer](https://junglewise.ai/threats/technologies/internet-explorer). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2014-0322 exploited in the wild?** Yes. CVE-2014-0322 is known to be exploited in the wild, first recorded on 4 May 2022. Treat it as urgent.

**How severe is CVE-2014-0322?** Critical severity, with a CVSS score of 8.8, published 4 May 2022.

**Which products and versions are affected?** Microsoft Internet Explorer 9 and 10.

**Is there a fix for CVE-2014-0322?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2014-0322 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2014-0322?** Check whether you run Microsoft Edge or Microsoft Internet Explorer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Internet Explorer 9 and 10

## Timeline

- 2014-01: exploited: Exploited in the wild in January and February 2014.
- 2014-02-13: disclosed: Public blog post regarding 0-day exploit.
- 2022-05-04: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.

## Related threats

- [Microsoft Edge out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-122518-out-of-bounds-read-in-microsoft-edge-chromium-based-allows-an)
- [Microsoft Edge privilege escalation via incorrect authorization](https://junglewise.ai/threats/cve-2026-69446-incorrect-authorization-in-microsoft-edge-chromium-based-allows)
- [Microsoft Edge use-after-free privilege elevation](https://junglewise.ai/threats/cve-2026-96203-use-after-free-in-microsoft-edge-chromium-based-allows-an)
- [Microsoft Edge heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96199-heap-based-buffer-overflow-in-microsoft-edge-chromium-based)
- [Microsoft Edge heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96198-heap-based-buffer-overflow-in-microsoft-edge-chromium-based)