CVE-2026-40551

Use of Client-Side Authentication in multiple BinSoft products

HIGH
8.4
CVSS Score
Published: April 28, 2026 at 01:13 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
8 products affected across 1 vendormpGabinetmpWarsztatmpPOS

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Severity
HIGH8.4
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 25.2.4
v ≤ 26.4.9
v ≤ 26.4.9
v ≤ 26.4.9
v ≤ 23.12.19
v ≤ 25.2.4
v ≤ 20.4.28

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Third Party Advisory
Source: cverecord
https://cert.pl/posts/2026/04/CVE-2026-40550/
Product
Source: cverecord
https://www.mpgabinet.pl/
Product
Source: cverecord
https://www.binsoft.pl/produkty

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-603

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