{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-40551", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-04-14T09:44:32.552Z", "datePublished": "2026-04-28T13:13:21.692Z", "dateUpdated": "2026-09-30T11:18:14.854Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-09-30T11:18:14.854Z" }, "title": "Use of Client-Side Authentication in multiple BinSoft products", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-603", "description": "CWE-603: Use of Client-Side Authentication", "type": "CWE" } ] } ], "affected": [ { "vendor": "BinSoft", "product": "mpGabinet", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "23.12.19", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpFirma", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "26.4.9", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpFaktura", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "26.4.9", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpFirma ERP", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "26.4.9", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpSekretariat", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "25.2.4", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpPOS", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "25.2.4", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpCRM", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "25.2.4", "versionType": "semver" } ], "defaultStatus": "affected" }, { "vendor": "BinSoft", "product": "mpWarsztat", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "20.4.28", "versionType": "semver" } ], "defaultStatus": "affected" } ], "descriptions": [ { "lang": "en", "value": "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. \n\nThe 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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "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. " } ] } ], "references": [ { "url": "https://cert.pl/posts/2026/04/CVE-2026-40550/", "tags": [ "third-party-advisory" ] }, { "url": "https://www.binsoft.pl/produkty", "tags": [ "product" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.4, "vectorString": "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" } } ], "configurations": [ { "lang": "en", "value": "Application has to be authenticated to the backend server prior to the attack", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "Application has to be authenticated to the backend server prior to the attack" } ] } ], "credits": [ { "lang": "en", "value": "Robert Kruczek", "type": "finder" }, { "lang": "en", "value": "Kamil Szczurowski", "type": "finder" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 0.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-04-28T14:16:07.976794Z", "id": "CVE-2026-40551", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-28T14:16:14.744Z" } } ] } }