What’s Vulnerable › Vulnerabilities

CVE-2026-40551: Use of Client-Side Authentication in multiple BinSoft products

• Severity: high (CVSS 8.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-28 · updated 2026-10-26
• Weakness: CWE-603

Description

Multiple BinSoft products perform 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. The described issue affects all published versions. The vendor stated that this issue is a direct result of the architecture model in which the software is distributed, and that it will be mitigated with a corrected installation manual.

Affected products

• BinSoft mpCRM: through 25.2.4
• BinSoft mpFaktura: through 26.4.9
• BinSoft mpFirma: through 26.4.9
• BinSoft mpFirma ERP: through 26.4.9
• BinSoft mpGabinet: through 23.12.19
• BinSoft mpPOS: through 25.2.4
• BinSoft mpSekretariat: through 25.2.4
• BinSoft mpWarsztat: through 20.4.28

References

• https://cert.pl/posts/2026/04/CVE-2026-40550/
• https://www.binsoft.pl/produkty

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