CVE-2020-25233: 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). The firmware update of affected devices contains the private RSA key that is used as a basis for encryption of communication with the device.

Affected products

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

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