# CVE-2023-39979

## Summary

- **CVE ID:** CVE-2023-39979
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-334
- **Published:** Sep 2, 2023
- **Last Modified:** Mar 13, 2026

## 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 (1.0)

## References

- [CNA](https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 50.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._