I wonder why C and C++ are usually regarded as equally insecure. In C you need to carefully check that you free allocated memory, and that you don't use it after you free it. In C++ this is automated by using classes like std::string and std::vector, once they go out of scope their memory is freed and you can't use it anymore. It is still possible, e.g. by using a for loop that iterates over a vector, and removing or adding stuff to that same vector in that loop. But my rough estimate is that such errors are at least ten times less likely in C++.

I develop in C++ for a job, and when I need to use a library written in C I always have a bad feeling about it.