CVE-2016-7200

HIGH KEV RANSOMWARE

Microsoft Edge - Remote Code Execution via Chakra JavaScript Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2016-7200 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added March 28, 2022, with confirmed use in ransomware campaigns. EIP tracks 4 public exploits from researchers including Google Security Research, Brian Pak, theori-io.

AI-analyzed exploit summary This exploit leverages a type confusion vulnerability in Chakra's Array.filter implementation, where a variable array is incorrectly treated as an integer array, leading to heap corruption and information leakage. The PoC demonstrates both memory corruption and out-of-bounds writes.

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-2016-7201, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.

Exploits (4)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/40785

This exploit leverages a type confusion vulnerability in Chakra's Array.filter implementation, where a variable array is incorrectly treated as an integer array, leading to heap corruption and information leakage. The PoC demonstrates both memory corruption and out-of-bounds writes.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Edge (Chakra JavaScript engine)
No auth needed
Prerequisites: Target must be using a vulnerable version of Microsoft Edge with Chakra engine
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC
by Brian Pak · textremotewindows
https://www.exploit-db.com/exploits/40990

This exploit leverages a type confusion vulnerability (CVE-2016-7200) and an information leak (CVE-2016-7201) in ChakraCore to achieve remote code execution. It demonstrates the exploitation by launching notepad.exe via WinExec.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: Microsoft Edge (ChakraCore) on Windows 10
No auth needed
Prerequisites: Victim must visit a malicious webpage served via HTTP server
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 140 stars
by theori-io · client-side
https://github.com/theori-io/chakra-2016-11

This repository contains a functional exploit for CVE-2016-7200 and CVE-2016-7201, targeting Microsoft Edge's Chakra JavaScript engine. The exploit leverages an info leak and type confusion vulnerability to achieve remote code execution (RCE), demonstrated by launching notepad.exe or triggering an INT 3 breakpoint.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Edge (Windows 10)
No auth needed
Prerequisites: Victim must visit a malicious webpage served via HTTP server
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by Theori-lO · poc
https://github.com/Theori-lO/chakra-2016-11

This repository contains a functional proof-of-concept exploit for CVE-2016-7200 and CVE-2016-7201, targeting Microsoft Edge's Chakra JavaScript engine. The exploit leverages an information leak and type confusion vulnerability to achieve remote code execution (RCE), demonstrated by launching notepad.exe or triggering an INT 3 breakpoint.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Edge (Windows 10, modern.ie stable)
No auth needed
Prerequisites: Victim must visit a malicious webpage served via HTTP server
devstral-2 · analyzed Apr 30, 2026 Full analysis →

References (8)

Core 8
Core References
Patch, Vendor Advisory vendor-advisory x_refsource_ms
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-129
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/40785/
Exploit, Third Party Advisory x_refsource_misc
https://github.com/theori-io/chakra-2016-11
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/93968
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/40990/
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037245

Scores

CVSS v3 8.8
EPSS 0.8800
EPSS Percentile 99.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2022-03-28
VulnCheck KEV 2017-01-11
InTheWild.io 2022-03-28
ENISA EUVD EUVD-2022-2667
Ransomware Use Confirmed
CWE
CWE-787
Status published
Products (2)
microsoft/edge
nuget/Microsoft.ChakraCore 0 - 1.2.2NuGet
Published Nov 10, 2016
KEV Added Mar 28, 2022
Tracked Since Feb 18, 2026