CVE-2023-28489: Siemens CP-8031 Firmware

Critical severity, CVSS 9.8. EPSS: 2.8% chance of exploitation in the next 30 days.

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). Affected devices are vulnerable to command injection via the web server port 443/tcp, if the parameter “Remote Operation” is enabled. The parameter is disabled by default. The vulnerability could allow an unauthenticated remote attacker to perform arbitrary code execution on the device.

Affected products

• Siemens CP-8031 Firmware: before cpci85_v05 (fixed in cpci85_v05)
• Siemens CP-8050 Firmware: before cpci85_v05 (fixed in cpci85_v05)

Published 2023-04-11. Last modified 2026-06-17.