CVE-2026-15105 davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead deserialization

A flaw has been found in davenardella snap7 up to 1.4.3. This affects the function TS7Worker::PerformFunctionRead of the file src/core/s7server.cpp of the component ReadVar Request Handler. This manipulation causes deserialization. The attack requires access to the local network. The exploit has...