Port 139NetBIOS/SMB
NetBIOS Session Service
About Port 139
Port 139 provides NetBIOS session services, commonly used for Windows file and printer sharing over NetBIOS. It is part of the legacy SMB protocol stack.
Security NotesExposing port 139 to the internet is extremely dangerous. It has been exploited by numerous worms and ransomware. Block at the firewall and use SMB over port 445 with encryption if file sharing is needed.
Total Hosts
38.2K
TLS Encrypted
1.3%
Vulnerable Hosts
2.2K
Countries
10+
China
United States
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Japan
Italy
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Germany
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