CVE-2016-8562: in the CISA KEV catalogue
Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability. CISA added CVE-2016-8562 to the Known Exploited Vulnerabilities catalogue on 2022-03-03 with a default due date of 2022-03-24. Known ransomware campaign use: Unknown. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Siemens SIMATIC CP
- CWE
- CWE-20
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 3.6%, percentile 89 (scored 2026-11-03)
EPSS puts about 3.6 in 100 odds (3.6%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 89% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2016-8562 in the CISA KEV catalogue?
Yes. CISA added CVE-2016-8562 (Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-03-03. CISA's default due date for it is 2022-03-24.
Is CVE-2016-8562 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2016-8562. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2016-8562?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2016-8562