CVE-2026-40551 PUBLISHED

Use of Client-Side Authentication in mpGabinet

Assigner: CERT-PL
Reserved: 14.04.2026 Published: 28.04.2026 Updated: 28.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	BinSoft
Product	mpGabinet
Versions	Default: affected affected from 0 to 23.12.19 (incl.)

Affected Configurations

Application has to be authenticated to the backend server prior to the attack

Credits

Robert Kruczek finder
Kamil Szczurowski finder

References

Problem Types

CWE-603: Use of Client-Side Authentication CWE