How severe is CVE-2025-4384?

CVE-2025-4384 has a CVSS 4.0 base score of 6.0, rated medium severity.

Is CVE-2025-4384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-4384?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-4384 have an EU (EUVD) identifier?

Yes. CVE-2025-4384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13609.

When was CVE-2025-4384 published?

CVE-2025-4384 was published on 2025-05-06 and last updated on 2026-06-17.

CVE-2025-4384

CVE-2025-4384 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.0. 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-298.

Key facts

Severity: Medium (CVSS 4.0 base score 6.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-13609
Weakness: CWE-298
Published: 2025-05-06
Last modified: 2026-06-17

Description

The MQTT add-on of PcVue fails to verify that a remote device’s certificate has not already expired or has not yet become valid. This allows malicious devices to present certificates that are not rejected properly. The use of a client certificate reduces the risk for random devices to take advantage of this flaw.

Frequently asked questions

What is CVE-2025-4384?: The MQTT add-on of PcVue fails to verify that a remote device’s certificate has not already expired or has not yet become valid. This allows malicious devices to present certificates that are not rejected properly. The use of a client certificate reduces the risk for random devices to take advantage of this flaw.
How severe is CVE-2025-4384?: CVE-2025-4384 has a CVSS 4.0 base score of 6.0, rated medium severity.
Is CVE-2025-4384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-4384?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4384 have an EU (EUVD) identifier?: Yes. CVE-2025-4384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13609.
When was CVE-2025-4384 published?: CVE-2025-4384 was published on 2025-05-06 and last updated on 2026-06-17.

References

https://www.pcvue.com/security/#SB2025-3

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