CVE-2020-25231: Siemens Logo! 8 Bm Firmware

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort (All versions < V8.3). The encryption of program data for the affected devices uses a static key. An attacker could use this key to extract confidential information from protected program files.

Affected products

• Siemens Logo! 8 Bm Firmware: before 8.3 (fixed in 8.3)
• Siemens Logo! Soft Comfort: before 8.3 (fixed in 8.3)

Published 2020-12-14. Last modified 2026-06-17.