What is CVE-2026-49186?

CVE-2026-49186 is a critical-severity vulnerability in Acer Connect_m6e_5g, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-06-04.

How severe is CVE-2026-49186?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Acer Connect_m6e_5g

CVE-2026-49186

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.

Vulnerability class: Broken Authentication

EPSS: 0.000 (10.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Acer Connect_m6e_5g
Acer Connect_m6e_5g_firmware
Acer Connect M6e 5g Portable Wifi Router

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

8fc372e3-d9c5-46e4-9410-38469745c639 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-49186?: CVE-2026-49186 is a critical-severity vulnerability in Acer Connect_m6e_5g, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-06-04.
How severe is CVE-2026-49186?: Critical severity. CVSS v3 base score is 9.8 out of 10.