CVE-2016-3377

ChakraCore RCE Vulnerability

7.5 HighFix available

CVE-2016-3377 is a high vulnerability (CVSS 7.5) in Microsoft Edge, published September 14, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 15.9%, the 96th percentile. Fixed in Microsoft.ChakraCore 1.2.1.

The Chakra JavaScript 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-2016-3350.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

15.9%Down 8.0 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2016-3377
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 7.6 HighAV:N/AC:H/Au:N/C:C/I:C/A:C
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2016-3377
Updated: 2026-11-02

EUVDEUVD-2022-5638 No score

Record: EUVD-2022-5638
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wv44-9w69-w43j 7.5

ChakraCore RCE Vulnerability

Record: GHSA-wv44-9w69-w43j
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

OSVGHSA-wv44-9w69-w43j 7.5

ChakraCore RCE Vulnerability

Record: GHSA-wv44-9w69-w43j
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

Affected products

microsoft edge

Affected packages

Affected packages
Package	Affected	Fixed
`Microsoft.ChakraCore` NuGet	before 1.2.1	1.2.1
`Microsoft.ChakraCore` NuGet	before 1.2.1, plus listed versions 1.2.0	1.2.1

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

References

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