Variable '%variable%' is uninitialized. Always initialize a member variable (type.6).

C++ Core Guidelines Type.6 and C.48

struct MyStruct
{
    int value;
    MyStruct() {}; // C26495, MyStruct::value is uninitialized
};

To fix the warning, add in-class initializers to all of the member variables. See the above linked C++ Core Guidelines pages for additional information.

struct MyStruct
{
    int value{};
    MyStruct() {}; // no warning, MyStruct::value is set via default member initialization
};