The term 'Cryptographically Weak Algorithm' is correct as it refers to a cryptographic algorithm or system that has become vulnerable and can be compromised due to advancements in computational power or attack techniques. These advancements might allow attackers to break the encryption more quickly than when the algorithm was initially deemed secure. 'Key Exhaustion' refers to the scenario when all possible keys in the key space have been used or tried, but it does not inherently mean the algorithm is weak due to advances in computing power. 'Algorithm Collisions' involve finding two inputs that result in the same output, which is a specific issue related to hash functions and doesn't speak to the issue of computational advancements rendering an algorithm insecure. 'Key Reuse' is a security risk associated with using the same encryption key across multiple sessions or for different purposes, but does not imply that the underlying algorithm is cryptographically weak.