CVE-2023-4418: Sick LMS500 Firmware

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A remote unprivileged attacker can sent multiple packages to the LMS5xx to disrupt its availability through a TCP SYN-based denial-of-service (DDoS) attack. By exploiting this vulnerability, an attacker can flood the targeted LMS5xx with a high volume of TCP SYN requests, overwhelming its resources and causing it to become unresponsive or unavailable for legitimate users.

Affected products

  • Sick LMS500 Firmware: any version
  • Sick LMS511 Firmware: any version
  • Sick LMS531 Firmware: any version

Published 2023-08-24. Last modified 2026-06-17.