CVE-2026-103906 PUBLISHED

Disabled TLS Certificate Validation Enables MITM Attacks

Assigner: ENISA
Reserved: 01.10.2026 Published: 09.11.2026 Updated: 09.11.2026

Use of hard-coded MQTT credentials in the AM CLUB mobile application allows an authenticated attacker to connect to the MQTT broker and access data or perform actions across tenant boundaries.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N/E:U
CVSS Score: 7.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	am_automatic_machines
Product	am_club
Versions	Default: unaffected affected from 1.7.194 to 1.8.198 (excl.)

Credits

Liviero Marco finder
CSIRT-IT coordinator

References

https://github.com/livieromarco/security-advisories/blob/main/advisories/CVE-2026-103906.md

Problem Types

CWE-798 CWE