Modbus attacks & scanning (port 502)
ICS/OT control protocol — unauthenticated register reads and control writes.
Observed by OffSeq honeypot sensors · last 30 days · #21 most-attacked service · last seen 19 minutes ago
7,826
Attacks
1,369
Distinct source IPs
502
Port · tcp
The #21 most-attacked service across the fleet in the last 30 days.
OffSeq honeypots emulating Modbus recorded 7,826 attacks from 1,369 distinct source IPs over the last 30 days. ICS/OT control protocol — unauthenticated register reads and control writes.
Top CVEs exploited across the fleet (last 30 days)
Fleet-wide, not scoped to Modbus.
- CVE-2017-01442,731
- CVE-2019-07082,655
- CVE-2024-45771,682
- CVE-2021-268551,652
- CVE-2017-9841542
- CVE-2025-5777269
- CVE-2023-3519150
- CVE-2012-212283