CVE-2025-40815

HighCVSS 7.2

Published: 11/11/2025(UTC)Updated: 13/10/2026(UTC)Translated: 13/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.38%

30th percentile - higher than 30% of all known CVEs

Summary

In LOGO! devices (including SIPLUS variants) with versions prior to V1.84.05, there is a vulnerability due to improper validation of TCP packet structures in several methods. This could allow an attacker to cause buffer overflows, gain control over the instruction counter, and run custom code.

Risk Assessment

An attacker could gain remote control over the device, potentially disrupting industrial processes or performing unauthorized actions in automation environments.

Recommendation

Update the firmware of LOGO! devices to version V1.84.05 or later.

Other vulnerabilities in Siemens LOGO!

CVE-2025-40817Medium
A vulnerability has been identified in LOGO! and SIPLUS LOGO! devices (all versions before V1.84.05) due to lack of certain validations when interacting with them. This could allow an unauthenticated remote attacker to change time of the device, which means the device could behave differently.

Original NVD description (English source)

A vulnerability has been identified in LOGO! 12/24RCE (6ED1052-1MD08-0BA2) (All versions < V1.84.05), LOGO! 12/24RCEo (6ED1052-2MD08-0BA2) (All versions < V1.84.05), LOGO! 230RCE (6ED1052-1FB08-0BA2) (All versions < V1.84.05), LOGO! 230RCEo (6ED1052-2FB08-0BA2) (All versions < V1.84.05), LOGO! 24CE (6ED1052-1CC08-0BA2) (All versions < V1.84.05), LOGO! 24CEo (6ED1052-2CC08-0BA2) (All versions < V1.84.05), LOGO! 24RCE (6ED1052-1HB08-0BA2) (All versions < V1.84.05), LOGO! 24RCEo (6ED1052-2HB08-0BA2) (All versions < V1.84.05), SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2) (All versions < V1.84.05). Affected devices do not properly validate the structure of TCP packets in several methods. This could allow an attacker to cause buffer overflows, get control over the instruction counter and run custom code.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS