How severe is CVE-2018-8298?

CVE-2018-8298 has a CVSS 3.1 base score of 7.5 (HIGH). EPSS estimates a 74.7% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2018-8298: ChakraCore Scripting Engine Type Confusion

CISA Known Exploited Vulnerabilities

ChakraCore Scripting Engine Type Confusion Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-03-03

Remediation due

2022-03-17

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2018-8298

Description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8242, CVE-2018-8283, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296.

Severity

CVSS 3.1 · CISA7.5 HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 15, 2026

All KEV statistics→

CISA added CVE-2018-8298 to the KEV catalog 1,331 days after its CVE record was published.
It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 166 added in 2022.
Its current EPSS score (74.7%) is higher than that of 61% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Microsoft	Microsoft ChakraCore	ChakraCore

References

3 Links

Exploits & PoCs

45217

Vulnerability databases

104639

Other references

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8298

Record Details

Published

2018-07-11

Last updated

2025-10-21

Assigner (CNA)

microsoft

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.