ZDI-26-126: (Pwn2Own) Ubiquiti Networks AI Pro Discovery Protocol Missing Encryption Protocol Downgrade Vulnerability

This vulnerability allows network-adjacent attackers to downgrade the communication protocol on affected installations of Ubiquiti Networks AI Pro. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.4. The following CVEs are assigned: CVE-2026-21633.