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Vulnerability record · CVE-2020-25229 · published 14 December 2020

CVE-2020-25229: 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). The implemented encryption for communication with affected devices is prone to replay attacks due to the usage of a static key. An attacker could change the password or change the configuration on any affected device if using prepared messages that were generated for another device.

7.5 CVSS 3.1 High EPSS 0.65% · top 51.0% CWE-321 · CWE-321CWE-798 · Hard-coded credentials
7.5CVSS 3.1 base score, v2 5.0
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected 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). The implemented encryption for communication with affected devices is prone to replay attacks due to the usage of a static key. An attacker could change the password or change the configuration on any affected device if using prepared messages that were generated for another device.

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

Affected products

1 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.

9.8CVE-2022-36361Siemens logo\! 8 bm firmware classic buffer overflow vulnerabilityA vulnerability has been identified in LOGO! 12/24RCE (6ED1052-1MD08-0BA1) (All versions), LOGO! 12/24RCEo (6ED1052-2MD08-0BA1) (All versions), LOGO!…EPSS 0.98%9.8CVE-2020-25228Siemens logo\! 8 bm firmware missing authentication for critical function vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). A service available on port 10005/tcp of the affecte…EPSS 1.6%9.8CVE-2020-7593Siemens logo\! 8 bm firmware classic buffer overflow vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (V1.81.01 - V1.81.03), LOGO! 8 BM (incl. SIPLUS variants) (V1.82.01), LOGO!…EPSS 8.7%9.1CVE-2020-7589Siemens logo\! 8 bm firmware missing authentication for critical function vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions). The vulnerability could lead to an attacker reading and mod…EPSS 2.0%7.7CVE-2020-25234Siemens logo\! 8 bm firmware vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort (All versions < V8.3). The LOGO! …EPSS 0.32%7.5CVE-2022-36362Siemens logo\! 8 bm firmware improper input validation vulnerabilityA vulnerability has been identified in LOGO! 12/24RCE (6ED1052-1MD08-0BA1) (All versions), LOGO! 12/24RCE (6ED1052-1MD08-0BA2) (All versions), LOGO! …EPSS 0.94%7.5CVE-2022-36360Siemens logo\! 8 bm firmware insufficient verification of data authenticity vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). Affected devices load firmware updates without check…EPSS 0.28%7.5CVE-2020-25235Siemens logo\! 8 bm firmware insufficiently protected credentials vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). The password used for authentication for the LOGO! W…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2020-25229), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.