known ransomware use

Microsoft Windows Privilege Escalation Vulnerability

Added to KEV
2022-03-28
Federal due date
2022-04-18
Vendor
Microsoft
Product
Windows
EPSS
99.8th percentile (score 0.926, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Known
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2017-0213

CISA short description

Microsoft Windows COM Aggregate Marshaler allows for privilege escalation when an attacker runs a specially crafted application.

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.