This indicates an attack attempt to exploit a Denial of Service Vulnerability in Wibu-Systems CodeMeter.
The vulnerability is due to insufficient validation in messages sent from remote clients. A remote attacker could exploit the vulnerability by sending crafted messages to the CodeMeter CmWAN server. Successful exploitation could result in a denial of service condition on the target.
Wibu-Systems CodeMeter prior to 7.21a
Denial of Service: Remote attackers can crash vulnerable systems
Apply the most recent upgrade or patch from the vendor.