Security researchers have published proof-of-concept (PoC) code for exploiting a recently-patched vulnerability in the Windows operating system, a vulnerability that has been reported to Microsoft by the US National Security Agency (NSA). From a report: The bug, which some have started calling CurveBall, impacts CryptoAPI (Crypt32.dll), the component that handles cryptographic operations in the Windows OS. According to a high-level technical…