Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

Added to KEV
2022-03-03
Federal due date
2022-03-24
Vendor
Siemens
Product
SIMATIC CP
EPSS
95.4th percentile (score 0.185, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2016-8562

CISA short description

An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.

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.