CVE-2020-25231

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-14 · updated 2026-06-17
Weakness: CWE-321

Description

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 (incl. SIPLUS variants): before 8.3 — fixed in 8.3
Siemens LOGO! Soft Comfort: before 8.3 — fixed in 8.3

How to fix

Upgrade to a fixed version: Siemens LOGO! 8 BM (incl. SIPLUS variants) 8.3; Siemens LOGO! Soft Comfort 8.3. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-25231 or the next vulnerability affects your stack