CVE-2025-40578 Denial of service in SCALANCE LPE9403

Medium 5.3 Published 13 May 2025 Updated 13 May 2025

An unauthenticated remote attacker can crash the dcpd process by sending rapid Profinet packets, causing a denial of service on SCALANCE LPE9403 devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-40578?

CVE-2025-40578 is a medium-severity denial of service vulnerability in Siemens SCALANCE LPE9403, published on 13 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions). Affected devices do not properly handle multiple incoming Profinet packets received in rapid succession. An unauthenticated remote attacker can exploit this flaw by sending multiple packets in a very short time frame, which leads to a crash of the dcpd process.

Weakness: CWE-125

Which versions are affected by CVE-2025-40578?

It affects 1 product.

Products include Siemens Scalance Lpe9403 Firmware.

How do I fix CVE-2025-40578?

No fix has been published for CVE-2025-40578 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-40578 being exploited?

There is no known exploitation of CVE-2025-40578 in the wild and no public exploit code.

Sources

Also known as GHSA-g2fj-8g9p-p2rc.