To prepare fresh corn, fill a large pot with water, bring it to a boil, and lightly salt it. After removing the husks, submerge the corn in the boiling water. Once the water returns to a boil, cook for 5 minutes. Remove the corn, allow it to cool, then slice the kernels off the cob with a sharp knife.
In a mixing bowl, combine the prepared corn, cucumber, red onion, cherry tomatoes, basil, and feta cheese.
In a separate small bowl, whisk together olive oil, white vinegar, lime juice, kosher salt, and black pepper. Pour the dressing over the vegetables and cheese. Toss everything together until well coated.
Serve the salad immediately, or refrigerate it and add the basil just before serving for optimal freshness. Store leftovers in an airtight container in the refrigerator for up to 4 days.