CVE-2026-49186Network attack vector

Device discovery and control via missing MQTT ACLs

Published Jun 4, 2026 · Updated Jun 4, 2026

Improper authentication in Acer Connect M6E firmware through M6E_AI_1.00.000019 allows remote authenticated users to access restricted MQTT topics. The local broker accepts global # and + wildcard subscriptions without topic-level ACL enforcement, exposing hidden-device messages and permitting unauthorized publishes. High-privilege broker access is required, and exploitation can disclose connected devices or deliver rogue control commands.

CVSS severity8.6
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Acer Connect M6E firmware through M6E_AI_1.00.000019 allows remote authenticated users to access restricted MQTT topics. The local broker accepts global # and + wildcard subscriptions without topic-level ACL enforcement, exposing hidden-device messages and permitting unauthorized publishes. High-privilege broker access is required, and exploitation can disclose connected devices or deliver rogue control commands.

The record

CVE
CVE-2026-49186
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Acer Inc.
Product
Acer Connect M6E 5G Mobile WiFi
Classifications
CWE-287, CAPEC-115, T1071.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=M6E_AI_1.00.000019

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Acer Inc. · Acer Connect M6E 5G Mobile WiFiversion=* <=M6E_AI_1.00.000019

Published CVSS scores

8.6AcerCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CAPEC-115Authentication Bypass
T1071.005Application Layer Protocol: Publish/Subscribe Protocols

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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