CVE-2016-7201
HighExploitedPublic exploitChakraCore RCE Vulnerability
Published May 14, 2022 · Updated Oct 22, 2025 · Also known as GHSA-4f5g-j7wg-7w8j
Key Facts
Patch immediately- CVE-2016-7201 is a high-severity vulnerability (CVSS 7.7 v4) affecting Edge (Microsoft), Microsoft.ChakraCore (nuget).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 11, 2017 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 80% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft.ChakraCore 1.2.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS (30-day exploit likelihood)
80%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2016-7201 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-7200, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 28, 2022 | Apr 18, 2022 | Not reported |
| Industry KEV feed | Jan 11, 2017 | Apr 18, 2022 | Known |
| CIRCL KEV | Mar 28, 2022 | Apr 18, 2022 | Not reported |
| ENISA EUVD | Mar 28, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| EdgeMicrosoft | See advisory | n/a |
| Microsoft.ChakraCorenuget | See advisory | 1.2.2 |
Patched Releases
Microsoft.ChakraCore
1.2.2
Timeline
Added to Industry KEV feed
Jan 11, 2017
Added to CISA KEV
Mar 28, 2022
Added to CIRCL KEV
Mar 28, 2022
Added to ENISA EUVD
Mar 28, 2022
Publicly disclosed
May 14, 2022
Last updated
Oct 22, 2025
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2016-7201
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-7200, CVE-2016-7202, CVE-2016-7203, CVE-201…
Affected: Edge (Microsoft); Microsoft.ChakraCore (nuget). 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 Jan 11, 2017 and is known to be used in ransomware campaigns.
Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.
Public exploit code is available.
Fixed versions are available, including Microsoft.ChakraCore 1.2.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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