CVE-2026-49186

Lack of MQTT Broker Topic Access Control Lists

Published Jun 4, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Acer connect M6e 5g Portable Wifi Router
Vendors & Products Acer connect M6e 5g Portable Wifi Router
Type Values Removed Values Added
First Time appeared Acer
Acer connect M6e 5g
Acer connect M6e 5g Firmware
CPEs cpe:2.3:h:acer:connect_m6e_5g:-:*:*:*:*:*:*:*
cpe:2.3:o:acer:connect_m6e_5g_firmware:*:*:*:*:*:*:*:*
Vendors & Products Acer
Acer connect M6e 5g
Acer connect M6e 5g Firmware
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Lack of MQTT Broker Topic Access Control Lists
Weaknesses CWE-287
References
Metrics cvssV4_0

{'score': 8.6, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Acer
Published
Updated
Jun 4, 2026, 12:37 PM
Reserved
May 28, 2026, 2:46 AM
Status
Analyzed
Published
Jun 4, 2026, 4:17 AM
Modified
Jul 22, 2026, 8:10 PM