Microsoft Edge and Internet Explorer Type Confusion Vulnerability

Added to KEV
2022-03-28
Federal due date
2022-04-18
Vendor
Microsoft
Product
Edge and Internet Explorer
EPSS
99.5th percentile (score 0.891, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2017-0037

CISA short description

Microsoft Edge and Internet Explorer have a type confusion vulnerability in mshtml.dll, which allows remote code execution.

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.