TI-2026-36389 Aliases CVE-2026-49186 GHSA-vvpf-h42q-v96v

Lack of MQTT Broker Topic Access Control Lists

LOW 39CWE-287Published 2026-06-04 · Updated 2026-06-04

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0032 25th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Acer	Connect M6E 5G Portable WiFi Router	up to M6E_AI_1.00.000019	—	No fix listed	CNA

Connect M6E 5G Portable WiFi Router VendorAcer Affected up to M6E_AI_1.00.000019 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:acer:connect_m6e_5g_firmware::::::::	up to m6e_ai_1.00.000019	Vulnerable	Acer
cpe:2.3:h:acer:connect_m6e_5g:-:::::::*	not specified by NVD	Running on	Acer

cpe:2.3:o:acer:connect_m6e_5g_firmware:*:*:*:*:*:*:*:* Versions up to m6e_ai_1.00.000019 Vulnerable ·Acer
cpe:2.3:h:acer:connect_m6e_5g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Acer

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-49186
2026-10-03 Alias added: GHSA-vvpf-h42q-v96v
2026-10-25 Priority changed: MEDIUM → LOW

References

Advisory 1

https://community.acer.com/en/kb/articles/19707

TI-2026-36388 Instruction Injection via FieldX MDM CVSS 4.0CRITICAL 10.0
TI-2026-36397 SCREEN_CLICK Authentication Bypass CVSS 4.0CRITICAL 9.4
TI-2026-36394 Exposed Hard-coded M3WebServer Backend API Key CVSS 4.0CRITICAL 9.3
TI-2026-36972 Shared Secret Quota Inflation CVSS 4.0CRITICAL 9.3
TI-2026-36978 Account Creation Exhaustion CVSS 4.0HIGH 8.8
TI-2026-36969 Exposed Factory Testing App Boundaries CVSS 4.0HIGH 8.8

See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences