An issue was discovered in Softing uaToolkit Embedded before 1.41.1. When a subscription with a very low MaxNotificationPerPublish parameter is created, a publish response is mishandled, leading to memory consumption. When that happens often enough, the device will be out of memory, i.e., a denial of service.

In Softing uaToolkit Embedded before 1.40.1, a malformed PubSub discovery announcement message can cause a NULL pointer dereference or out-of-bounds memory access in the subscriber application.

In Softing uaToolkit Embedded before 1.41, a malformed CreateMonitoredItems request may cause a memory leak.

An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66, and uaToolkit Embedded before 1.40. Remote attackers to cause a denial of service (DoS) by sending crafted messages to a client or server. The server process may crash unexpectedly because of a double free, and must be restarted.

An issue was discovered in Softing Industrial Automation uaToolkit Embedded before 1.40. Remote attackers to cause a denial of service (DoS) or login as an anonymous user (bypassing security checks) by sending crafted messages to a OPC/UA server. The server process may crash unexpectedly because of an invalid type cast, and must be restarted.