CVE-2023-33921: Siemens CPCI85 Firmware

Medium severity, CVSS 6.8. EPSS: 0.4% 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). The affected devices contain an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.

Affected products

• Siemens CPCI85 Firmware: before v05 (fixed in v05)

Published 2023-06-13. Last modified 2026-06-17.