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

Quick assessment

Affected
Acer Connect M6E 5G Portable WiFi Router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Acer M6E是中国台湾宏碁（Acer）公司的一款便携式5G移动热点设备。 Acer M6E存在安全漏洞，该漏洞源于本地MQTT Broker未强制实施主题级访问控制列表，可能导致任何客户端使用通配符订阅以枚举隐藏网络设备或发布恶意控制命令。

AI Predicted 5.3 Difficulty: Easy EPSS 0.47% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
Acer Connect M6E 5G Portable WiFi Router *≤ M6E_AI_1.00.000019 affected
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I. Basic Information for CVE-2026-49186

Vulnerability Information
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Vulnerability Title
Lack of MQTT Broker Topic Access Control Lists
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Acer M6E 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Acer M6E是中国台湾宏碁（Acer）公司的一款便携式5G移动热点设备。 Acer M6E存在安全漏洞，该漏洞源于本地MQTT Broker未强制实施主题级访问控制列表，可能导致任何客户端使用通配符订阅以枚举隐藏网络设备或发布恶意控制命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Acer Connect M6E 5G Portable WiFi Router * ~ M6E_AI_1.00.000019 -

II. Public POCs for CVE-2026-49186

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III. Intelligence Information for CVE-2026-49186

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Vendor Advisories for CVE-2026-49186 (1)

Same Patch Batch · Acer · 2026-06-04 · 26 CVEs total

CVE-2026-50224 Unauthenticated IPv6 WAN Management Exposure
CVE-2026-50206 VPN Command Injection Vulnerability
CVE-2026-50205 Plaintext Log Credential Leakage
CVE-2026-50207 Local Modem Manipulation via Binder Interfaces
CVE-2026-50226 Firmware Theft & IMEI Spoofing via Connect-OTA
CVE-2026-50225 Account Creation Exhaustion
CVE-2026-50212 Arbitrary Remote Device Unbinding
CVE-2026-50211 Exposed Factory Testing App Boundaries
CVE-2026-50209 MDM Server Registration Overriding
CVE-2026-50210 Weak Static Cryptographic Initialization Vectors
CVE-2026-50213 Bulk User Private Data Harvesting
CVE-2026-50208 Permissive TrustAllCerts TLS Verification
CVE-2026-50214 Shared Secret Quota Inflation
CVE-2026-49204 Hard-coded AWS Cognito Testing Accounts
CVE-2026-49191 Exposed Hard-coded M3WebServer Backend API Key
CVE-2026-49189 Broadcast Receiver Privilege Escalation
CVE-2026-49190 Missing Per-Instruction Authorization Checks
CVE-2026-49192 Summary Service Insecure Direct Object Reference
CVE-2026-49202 Unverified Meeting Recording Endpoints & Permissive CORS
CVE-2026-49194 SCREEN_CLICK Authentication Bypass

Showing top 20 of 26 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Connect M6E 5G Portable WiFi Router
Same vendor: Acer
Same weakness: CWE-287

V. Comments for CVE-2026-49186

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