Johnson Controls Metasys 4.1 through 6.5, as used in Application and Data Server (ADS), Extended Application and Data Server (aka ADX), LonWorks Control Server 85 LCS8520, Network Automation Engine (NAE) 55xx-x, Network Integration Engine (NIE) 5xxx-x, and NxE8500, allows remote attackers to read password hashes via a POST request.