What’s Vulnerable › Vulnerabilities

CVE-2023-39979: MXsecurity Authentication Bypass

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-02 · updated 2026-06-17
• Weakness: CWE-334

Description

There is a vulnerability in MXsecurity versions prior to 1.0.1 that can be exploited to bypass authentication. A remote attacker might access the system if the web service authenticator has insufficient random values.

Affected products

• Moxa MXsecurity Series: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: Moxa MXsecurity Series 1.1.0. Check the vendor advisory for mitigations.

References

• https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities
• https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities

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