Use of Client-Side Authentication in multiple BinSoft products (CVE-2026-40551) | HOL Guard CVE

High · CVSS 8.4CVE-2026-40551

Use of Client-Side Authentication in multiple BinSoft products

Answer in brief

CVE-2026-40551 records a High severity (CVSS 8.4) vulnerability in Use of Client-Side Authentication in multiple BinSoft products. The current sources do not mark it as known exploited. The current feed maps BinSoft/mpCRM (generic), BinSoft/mpFaktura (generic), BinSoft/mpFirma (generic), BinSoft/mpFirma ERP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 28, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.4
Exploitation: Not marked as known exploited
Affected software: 8 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps BinSoft/mpCRM (generic), BinSoft/mpFaktura (generic), BinSoft/mpFirma (generic), BinSoft/mpFirma ERP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
BinSoft/mpCRMgeneric	*	Not reported
BinSoft/mpFakturageneric	*	Not reported
BinSoft/mpFirmageneric	*	Not reported
BinSoft/mpFirma ERPgeneric	*	Not reported
BinSoft/mpGabinetgeneric	*	Not reported
BinSoft/mpPOSgeneric	*	Not reported
BinSoft/mpSekretariatgeneric	*	Not reported
BinSoft/mpWarsztatgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for BinSoft/mpCRM, BinSoft/mpFaktura, BinSoft/mpFirma.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Apr 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.