Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-8243

26
FAUCET Score

CVE-2018-8243 describes a remote code execution vulnerability stemming from a memory corruption flaw within the ChakraCore scripting engine, specifically affecting Microsoft ChakraCore. This high-severity vulnerability (CVSS 7.5) can be exploited remotely with high impact on confidentiality, integrity, and availability, though it requires user interaction and has high attack complexity. Despite its severity and a high FAUCET Risk Score, there is no evidence of active exploitation, and public exploit code (Metasploit, Nuclei, ExploitDB) is currently unavailable. Community discussion and media coverage are minimal, with only one article mentioning its fix in a Microsoft Patch Tuesday update.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:chakracore:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
11.17%
Probability of exploitation in next 30 days
EPSS Percentile
95.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1117 is in the 75th percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ChakraCore
View patch
nugetpatch availablevia ghsa
Product: Microsoft.ChakraCoreFixed in: 1.8.5

Vendor Advisories (2)

nugetGHSA-w4qx-vw2w-q566high

ChakraCore RCE Vulnerability

May 13, 2022
microsoft2018-Jun/CVE-2018-8243Critical

Scripting Engine Memory Corruption Vulnerability

Jun 12, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8243
PatchVendor Advisory
securityfocus.com / bid/104403
Third Party AdvisoryVDB Entry