#VU72487 Security features bypass in LTE3202-M437 and LTE3316-M604 - CVE-2023-22920

Vulnerability identifier: #VU72487

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-22920

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LTE3202-M437
Hardware solutions / Firmware
LTE3316-M604
Hardware solutions / Firmware

Vendor: ZyXEL Communications Corp.

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a factory default misconfiguration intended for testing purposes. A remote attacker can access the affected device using Telnet.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LTE3202-M437: 1.00(ABWF.1)C0

LTE3316-M604: 2.00(ABMP.6)C0

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External links
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-security-misconfiguration-vulnerability-of-4g-lte-indoor-routers

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.