How severe is CVE-2026-40551?

CVE-2026-40551 has a CVSS 4.0 base score of 8.4, rated high severity.

Is CVE-2026-40551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40551?

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-2026-40551 have an EU (EUVD) identifier?

Yes. CVE-2026-40551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26045.

When was CVE-2026-40551 published?

CVE-2026-40551 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-40551

CVE-2026-40551 is a high-severity vulnerability with a CVSS 4.0 base score of 8.4. 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-603.

Key facts

Severity: High (CVSS 4.0 base score 8.4)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26045
Weakness: CWE-603
Published: 2026-04-28
Last modified: 2026-06-17

Description

mpGabinet performs client-side authentication. An attacker with access to any application instance connected to the backend server can bypass the login verification process by manipulating the application binary and authenticate as an arbitrary user. This issue affects mpGabinet version 23.12.19 and below.

Frequently asked questions

What is CVE-2026-40551?: mpGabinet performs client-side authentication. An attacker with access to any application instance connected to the backend server can bypass the login verification process by manipulating the application binary and authenticate as an arbitrary user. This issue affects mpGabinet version 23.12.19 and below.
How severe is CVE-2026-40551?: CVE-2026-40551 has a CVSS 4.0 base score of 8.4, rated high severity.
Is CVE-2026-40551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-40551?: 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-2026-40551 have an EU (EUVD) identifier?: Yes. CVE-2026-40551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26045.
When was CVE-2026-40551 published?: CVE-2026-40551 was published on 2026-04-28 and last updated on 2026-06-17.

References

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