MQTT attacks & scanning (port 1883)
IoT messaging — unauthenticated topic subscription and enumeration.
Observed by OffSeq honeypot sensors · last 7 days · #20 most-attacked service · last seen 1 hour ago
1,972
Attacks
391
Distinct source IPs
1883
Port · tcp
The #20 most-attacked service across the fleet in the last 7 days.
OffSeq honeypots emulating MQTT recorded 1,972 attacks from 391 distinct source IPs over the last 7 days. IoT messaging — unauthenticated topic subscription and enumeration.
Top CVEs exploited across the fleet (last 7 days)
Fleet-wide, not scoped to MQTT.
- CVE-2019-0708501
- CVE-2021-26855479
- CVE-2024-4577479
- CVE-2017-9841401
- CVE-2017-0144252
- CVE-2025-324890