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Fencer Intel
high 7.5

CVE-2016-7203 in the critical feed json

ChakraCore RCE Vulnerability

published 2016-11-10 9 y ago modified 2026-06-17 4 mo ago also GHSA-wcvc-rhfj-997g , EUVD-2022-5558

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
64.9%
EPSS 64.9% chance of exploitation in 30 days, percentile 99.2%
public exploits
1
Exploit-DB

Summary

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

Patch / fix

  • nuget Microsoft.ChakraCore 1.2.2

Timeline

  1. Published
  2. First public exploit (EDB-40787)

Exploit prediction

64.89% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-40787 Microsoft Edge - 'Array.splice' Heap Overflow dos, 2016-11-18

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.ChakraCore
<1.2.2
1.2.2

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.