CVE-2018-9149

Name: CVE-2018-9149
Creator: NVD / NIST
Published: 2018-04-01T18:29:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.47%

Last modified Jun 17, 2026

CVE-2018-9149 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Zyxel	Ac3000 Firmware	All versions

References

https://www.slideshare.net/secret/qrHwDOJ71eLg7fExploit, Third Party Advisory
https://www.slideshare.net/secret/qrHwDOJ71eLg7fExploit, Third Party Advisory

Timeline

Published: Apr 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-9149?

How severe is CVE-2018-9149?

Severity scoring for CVE-2018-9149 is pending analysis. The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2018-9149?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-9149?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST