CVE-2023-33920: 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 the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

Affected products

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

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