CVE-2026-49186 Lack of MQTT Broker Topic Access Control Lists
Attackers can subscribe to all topics to enumerate devices or publish rogue commands due to missing MQTT topic access controls.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49186?
CVE-2026-49186 is a high-severity missing authorization vulnerability in Acer Connect M6E 5G Portable WiFi Router, published on 4 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-49186?
It affects 1 product.
Products include Acer Connect M6e 5g Firmware.
How do I fix CVE-2026-49186?
No fix has been published for CVE-2026-49186 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-49186 being exploited?
There is no known exploitation of CVE-2026-49186 in the wild and no public exploit code.
Other vulnerabilities in Acer Connect M6E 5G Portable WiFi Router
Sources
Also known as GHSA-vvpf-h42q-v96v.