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TI-2018-06649 Aliases CVE-2018-9149GHSA-9j87-wr37-cwg6

The Zyxel Multy X (AC3000 Tri-Band WiFi System) device doesn't use a suitable mechanism…

Priority LOW 30CWE-798Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-798.

Summary

The Zyxel Multy X (AC3000 Tri-Band WiFi System) device doesn't use a suitable mechanism to protect the UART. After an attacker dismantles the device and uses a USB-to-UART cable to connect the device, he can use the 1234 password for the root account to login to the system. Furthermore, an attacker can start the device's TELNET service as a backdoor.

Why it matters now

EPSS 0.00458 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:ac3000_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableZyxel
cpe:2.3:h:zyxel:ac3000:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:ac3000_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:ac3000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-9149
  2. 2026-10-03 Alias added: GHSA-9j87-wr37-cwg6

References

Exploit 1

Sources

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