How severe is CVE-2025-34226?

CVE-2025-34226 has a CVSS 4.0 base score of 7.1, rated high severity.

Is CVE-2025-34226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-34226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-34226 have an EU (EUVD) identifier?

Yes. CVE-2025-34226 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32488.

When was CVE-2025-34226 published?

CVE-2025-34226 was published on 2025-10-03 and last updated on 2026-06-17.

CVE-2025-34226

CVE-2025-34226 is a high-severity vulnerability with a CVSS 4.0 base score of 7.1. 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-20.

Key facts

Severity: High (CVSS 4.0 base score 7.1)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-32488
Weakness: CWE-20
Published: 2025-10-03
Last modified: 2026-06-17

Description

OpenPLC Runtime v3 contains an input validation flaw in the /upload-program-action endpoint: the epoch_time field supplied during program uploads is not validated and can be crafted to induce corruption of the programs database. After a successful malformed upload the runtime continues to operate until a restart; on restart the runtime can fail to start because of corrupted database entries, resulting in persistent denial of service requiring complete rebase of the product to recover. This vulnerability was remediated by commit 095ee09.

Frequently asked questions

What is CVE-2025-34226?: OpenPLC Runtime v3 contains an input validation flaw in the /upload-program-action endpoint: the epoch_time field supplied during program uploads is not validated and can be crafted to induce corruption of the programs database. After a successful malformed upload the runtime continues to operate until a restart; on restart the runtime can fail to start because of corrupted database entries, resulting in persistent denial of service requiring complete rebase of the product to recover. This vulnerability was remediated by commit 095ee09.
How severe is CVE-2025-34226?: CVE-2025-34226 has a CVSS 4.0 base score of 7.1, rated high severity.
Is CVE-2025-34226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-34226?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-34226 have an EU (EUVD) identifier?: Yes. CVE-2025-34226 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32488.
When was CVE-2025-34226 published?: CVE-2025-34226 was published on 2025-10-03 and last updated on 2026-06-17.

References

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