CVE-2026-15105 davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead out-of-bounds write

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 out-of-bounds write. The attack requires access to the local network. The exploit...

PT-2026-56618

Name of the Vulnerable Software and Affected Versions davenardella snap7 versions prior to 1.4.4 Description A flaw in the ReadVar Request Handler component allows for deserialization. The issue resides in the TS7Worker::PerformFunctionRead function within the src/core/s7 server.cpp file...