CVE-2021-33541

Name of the Vulnerable Software and Affected Versions Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 (affected versions not specified)

Description The issue is related to a Denial-of-Service condition where the communication protocols and device access lack authentication measures. Remote attackers can exploit this by sending specially crafted IP packets to cause a denial of service on the PLC's network communication module, effectively stopping all network communication. The automation task remains unaffected. To restore network connectivity, the device must be restarted.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.