CVE-2023-42796: Siemens CP-8031 Firmware

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

Affected products

• Siemens CP-8031 Firmware: before 05.11 (fixed in 05.11)
• Siemens CP-8050 Firmware: before 05.11 (fixed in 05.11)

Published 2023-10-10. Last modified 2026-06-17.