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Vulnerability record · CVE-2026-40551 · published 28 April 2026

CVE-2026-40551: mpGabinet performs client-side authentication.

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.

8.4 CVSS 4.0 High EPSS 0.19% · top 92.0% CWE-603 · CWE-603 Deferred
8.4CVSS 4.0 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://cert.pl/posts/2026/04/CVE-2026-40550/
https://www.mpgabinet.pl/

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Source: NIST National Vulnerability Database (record CVE-2026-40551), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.