Bring a large pot of salted water to a boil, and add the pasta. Cook according to package directions until al dente. Drain and rinse under cold water to cool.

In a large mixing bowl, combine the black beans, cherry tomatoes, bell pepper, red onion, corn, and cilantro.

In a small bowl, whisk together the lime juice, olive oil, cumin, salt, and pepper until well blended.

Add the cooled pasta to the bowl with the vegetables. Pour the dressing over the mixture and gently toss until everything is evenly coated.

Finally, fold in the diced avocado just before serving to maintain its fresh flavor and texture.