CVE-2026-49186 HIGH

CVE-2026-49186: Lack of MQTT Broker Topic Access Control Lists

Vendor Acer
Product Connect M6E 5G Portable WiFi Router
Weakness CWE-287 · Improper authentication
Published June 4, 2026
Last update June 4, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 4, 2026 CVE published
June 4, 2026 Record updated