# CVE-2020-0674: Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability

Source: https://junglewise.ai/threats/cve-2020-0674-microsoft-internet-explorer-scripting-engine-memory-corruption  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2020-0674 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2021-11-03

A remote code execution vulnerability exists in Microsoft Internet Explorer's scripting engine due to improper handling of objects in memory. An attacker could exploit this memory corruption (specifically a use-after-free) to execute arbitrary code in the context of the current user.

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

## Quick answers

**Is CVE-2020-0674 exploited in the wild?** Yes. CVE-2020-0674 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2020-0674?** Critical severity, with a CVSS score of 7.5, published 3 November 2021.

**Which products and versions are affected?** Microsoft Internet Explorer 11; Microsoft Internet Explorer 10; Microsoft Internet Explorer 9.

**Is there a fix for CVE-2020-0674?** A patch was published on 2020-02-11: Security updates released by Microsoft Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2020-0674 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2020-0674?** Check whether you run 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 11
- Microsoft Internet Explorer 10
- Microsoft Internet Explorer 9

## Timeline

- 2020-01-17: disclosed: Initial advisory release by Microsoft
- 2020-02-11: patched: Security updates released by Microsoft
- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: exploited: Confirmed as exploited in the wild per CISA KEV catalog

## Related threats

- [Microsoft Internet Explorer use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-83741-use-after-free-in-internet-explorer-allows-an-authorized-attacker)
- [Microsoft Internet Explorer use-after-free in HTML object handling](https://junglewise.ai/threats/cve-2010-0249-microsoft-internet-explorer-use-after-free-in-html-object-handling)
- [Microsoft Internet Explorer use-after-free in Peer Objects](https://junglewise.ai/threats/cve-2010-0806-microsoft-internet-explorer-use-after-free-in-peer-objects)
- [Microsoft Internet Explorer use-after-free in CSS processing](https://junglewise.ai/threats/cve-2010-3962-microsoft-internet-explorer-use-after-free-in-css-processing)
- [Microsoft Internet Explorer use after free in mshtml.dll](https://junglewise.ai/threats/cve-2013-3893-microsoft-internet-explorer-use-after-free-in-mshtml-dll)