CVE-2018-8373

KEVMicrosoft Scripting Engine Memory Corruption Vulnerability

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer.

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8353, CVE-2018-8355, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.

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

PublishedAug 15, 2018

Last modifiedJun 17, 2026

Added to KEVMar 25, 2022

Remediation dueApr 15, 2022

References

securityfocus.com/bid/105037Broken LinkThird Party Advisory
securitytracker.com/id/1041483Broken LinkThird Party Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8373PatchVendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8373US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1656 days
CVSS: 7.5 HIGH
EPSS (30-day exploit probability): 61.5% · top 1% of all CVEs
Weakness: CWE-787
Attack vector: Network, remotely reachable

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.