# CVE-2017-0149: Microsoft Internet Explorer Memory Corruption Vulnerability

Source: https://junglewise.ai/threats/cve-2017-0149-microsoft-internet-explorer-memory-corruption-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-24. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-0149 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-24

Microsoft Internet Explorer 9 through 11 contains a memory corruption vulnerability (out-of-bounds write) when processing crafted websites. This flaw allows remote attackers to execute arbitrary code or cause a denial-of-service condition.

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-2017-0149 exploited in the wild?** Yes. CVE-2017-0149 is known to be exploited in the wild, first recorded on 24 May 2022. Treat it as urgent.

**How severe is CVE-2017-0149?** Critical severity, with a CVSS score of 8.8, published 24 May 2022.

**Which products and versions are affected?** Microsoft Internet Explorer 9 through 11.

**Is there a fix for CVE-2017-0149?** A patch was published on 2017-03-17: MSRC advisory and patch information available Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2017-0149 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2017-0149?** 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 through 11

## Timeline

- 2017-03-16: disclosed: NVD Published Date
- 2017-03-17: patched: MSRC advisory and patch information available
- 2022-05-24: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-05-24: exploited: Confirmed exploited in the wild per CISA KEV entry

## 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)