CVE-2025-40578: Siemens Scalance LPE9403 Firmware

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Siemens Scalance LPE9403 Firmware: affected versions not specified

Published 2025-05-13. Last modified 2026-06-17.