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Vulnerability record · CVE-2020-7593 · published 14 July 2020

CVE-2020-7593: Siemens logo\! 8 bm firmware classic buffer overflow vulnerability

Siemens · Logo\! 8 Bm Firmware

A 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! 8 BM (incl. SIPLUS variants) (V1.82.02). A buffer overflow vulnerability exists in the Web Server functionality of the device. A remote unauthenticated attacker could send a specially crafted HTTP request to cause a memory corruption, potentially resulting in remote code execution.

9.8 CVSS 3.1 Critical EPSS 8.7% · top 5.0% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score, v2 7.5
8.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A 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! 8 BM (incl. SIPLUS variants) (V1.82.02). A buffer overflow vulnerability exists in the Web Server functionality of the device. A remote unauthenticated attacker could send a specially crafted HTTP request to cause a memory corruption, potentially resulting in remote code execution.

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

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-573753.pdf Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1069 ExploitThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-573753.pdf Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1069 ExploitThird Party 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%9.1CVE-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%7.5CVE-2020-25229Siemens logo\! 8 bm firmware hard-coded credentials vulnerabilityA vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). The implemented encryption for communication with af…EPSS 0.65%

Source: NIST National Vulnerability Database (record CVE-2020-7593), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.