# CVE-2016-7201: ChakraCore RCE Vulnerability

Source: https://junglewise.ai/threats/cve-2016-7201-microsoft-edge-memory-corruption-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-14. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2016-7201 · Severity: critical · CVSS 3 · Exploited in the wild · Published 2022-05-14

A type confusion vulnerability in the Chakra JavaScript scripting engine within Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service. The flaw is triggered when a user visits a specially crafted website, leading to memory corruption.

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

## Quick answers

**Is CVE-2016-7201 exploited in the wild?** Yes. CVE-2016-7201 is known to be exploited in the wild, first recorded on 28 March 2022. Treat it as urgent.

**How severe is CVE-2016-7201?** Critical severity, with a CVSS score of 3, published 14 May 2022.

**Which products and versions are affected?** Microsoft.ChakraCore (NuGet) ECOSYSTEM:introduced=0,fixed=1.2.2.

**Is there a fix for CVE-2016-7201?** Yes. Microsoft.ChakraCore (NuGet): upgrade to 1.2.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2016-7201 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2016-7201?** Check whether you run Microsoft Edge, Microsoft Internet Explorer or Microsoft.ChakraCore (NuGet) at an affected version. 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.

## How to fix

- Microsoft.ChakraCore (NuGet): upgrade to 1.2.2 or later

  ```sh
  dotnet add package Microsoft.ChakraCore --version 1.2.2
  ```


## Affected products

- Microsoft Edge -
- Microsoft Windows 10 1507 -
- Microsoft Windows 10 1511 -
- Microsoft Windows 10 1607 -
- Microsoft Windows Server 2016 -

## Identifiers

- CVE-2016-7201
- GHSA-4f5g-j7wg-7w8j

## Timeline

- 2016-11-08: patched: Microsoft released security bulletin MS16-129 to address the issue.
- 2022-03-28: kev added: CISA added this vulnerability to the Known Exploited Vulnerabilities (KEV) catalog.
- 2022-03-28: disclosed: NVD publication date.

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- [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)