Microsoft Scripting Engine Memory Corruption Vulnerability

Added to KEV
2022-03-25
Federal due date
2022-04-15
Vendor
Microsoft
Product
Internet Explorer Scripting Engine
EPSS
99.3th percentile (score 0.825, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2018-8373

CISA short description

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

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.