Buffer Overflow Vulnerability in LOGO! Products by Siemens

CVE-2025-40815

What is CVE-2025-40815?

A significant vulnerability has been identified in various Siemens LOGO! products due to improper validation of TCP packet structures. This flaw can lead to a buffer overflow condition, potentially allowing malicious actors to manipulate the execution flow of the software. By exploiting this vulnerability, an attacker may gain control of the instruction counter, enabling them to execute arbitrary code on the affected devices. Organizations using these products should take immediate precautions to mitigate potential risks.

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