There is no official v14 or v15. Many fake "newer versions" are malware. v13 patched is the last stable community release from 2021.
To run Netcat GUI v1.3 patched, you'll need a system that meets the following requirements: netcat gui v13 download patched
Downloads promising "patched" or "full" versions on social media or unofficial sites are frequently vectors for viruses and info-stealers. Safe Alternatives: There is no official v14 or v15
Are you planning to use Netcat for or for general network debugging ? Is NetCat command dangerous? - Super User netcat gui v13 download patched