902,191 Hosts on Port 1911 and 816,986 on 4911: Niagara Supervisors Exposed

ZoomEye queries from 27 September 2026 returned 902,191 hosts on port 1911 and 816,986 on port 4911, both associated with the Niagara building automation supervisor framework. Compromising a supervisor grants access to every downstream system and its stored credentials.

• 902,191 hosts on port 1911 and 816,986 on port 4911 per ZoomEye
• Both ports belong to Niagara, a building management supervisor layer
• The supervisor holds credentials for all downstream systems
• The framework has a substantial history of web and file-handling flaws