CVE-2023-39979

CVE-2023-39979 is a critical-severity vulnerability in Moxa Mxsecurity with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-330.

Key facts

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.

Frequently asked questions

What is CVE-2023-39979?
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.
How severe is CVE-2023-39979?
CVE-2023-39979 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-39979 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39979?
CVE-2023-39979 affects Moxa Mxsecurity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39979?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-39979 published?
CVE-2023-39979 was published on 2023-09-02 and last updated on 2026-06-17.

References

Affected products (1)

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