CWE-563 Assignment to Variable without Use

The variable's value is assigned but never used, i.e., is a dead store. That is, after the assignment, the variable is either assigned another value or goes out of scope.

• Other: Quality Degradation, Varies by Context — This weakness could be an indication of a bug in the program or a deprecated variable that was not removed and is an indication of poor quality. This could lead to further bugs and the introduction of weaknesses.

• [Implementation] Remove unused variables from the code.

• Automated Static Analysis: Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)