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Vulnerability record · CVE-2020-25231 · published 14 December 2020

CVE-2020-25231: Siemens logo\! 8 bm firmware hard-coded credentials vulnerability

Siemens · Logo\! 8 Bm Firmware

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.

5.5 CVSS 3.1 Medium EPSS 0.18% · top 93.1% CWE-321 · CWE-321CWE-798 · Hard-coded credentials
5.5CVSS 3.1 base score, v2 2.1
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-25231), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.