How severe is CVE-2023-3634?

CVE-2023-3634 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-3634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-3634?

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-2023-3634 have an EU (EUVD) identifier?

Yes. CVE-2023-3634 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44280.

When was CVE-2023-3634 published?

CVE-2023-3634 was published on 2026-04-16 and last updated on 2026-06-17.

CVE-2023-3634

CVE-2023-3634 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-1242.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44280
Weakness: CWE-1242
Published: 2026-04-16
Last modified: 2026-06-17

Description

In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.

Frequently asked questions

What is CVE-2023-3634?: In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.
How severe is CVE-2023-3634?: CVE-2023-3634 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-3634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-3634?: 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-2023-3634 have an EU (EUVD) identifier?: Yes. CVE-2023-3634 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44280.
When was CVE-2023-3634 published?: CVE-2023-3634 was published on 2026-04-16 and last updated on 2026-06-17.

References

Other CWE-1242 vulnerabilities

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CVE-2025-41756 — High (CVSS 8.1): A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API…
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CVE-2025-22450 — High (CVSS 7.5): Inclusion of undocumented features issue exists in UD-LT2 firmware Ver.1.00.008_SE and earlier. A remote attacker may…

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