CVE-2016-8562: Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

High severity, CVSS 7.5. Actively exploited: in CISA KEV since 2022-03-03. EPSS: 3.6% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.

Affected products

• Siemens SIMATIC CP 1543-1 Firmware: before 2.0.28 (fixed in 2.0.28)
• Siemens Siplus Net CP 1543-1 Firmware: before 2.0.28 (fixed in 2.0.28)

Published 2016-11-18. Last modified 2026-06-17.