CVE-2026-49186
Lack of MQTT Broker Topic Access Control Lists
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.6EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
04 Jun 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
The local MQTT broker does not enforce topic-level Access Control Lists (ACLs). This allows any client to subscribe using wildcard characters (# or +) to enumerate hidden network devices or publish rogue control commands.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Acer · Connect M6E 5G Portable WiFi RouterWant to know if your infrastructure is exposed to this?
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