{"id":"CVE-2026-40551","aliases":["EUVD-2026-26045","GHSA-4r5q-f55r-9frx"],"status":"published","title":"Use of Client-Side Authentication in multiple BinSoft products","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.  \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.","severity":{"version":"4.0","score":8.4,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00132,"percentile":0.02858,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-603"],"published":"2026-04-28T13:13:21Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"binsoft","product":"mpcrm"},{"vendor":"binsoft","product":"mpfaktura"},{"vendor":"binsoft","product":"mpfirma"},{"vendor":"binsoft","product":"mpfirma erp"},{"vendor":"binsoft","product":"mpgabinet"},{"vendor":"binsoft","product":"mppos"},{"vendor":"binsoft","product":"mpsekretariat"},{"vendor":"binsoft","product":"mpwarsztat"}],"references":[{"url":"https://cert.pl/posts/2026/04/CVE-2026-40550/","tags":["third-party-advisory"]},{"url":"https://www.binsoft.pl/produkty","tags":["product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40551"},{"url":"https://cert.pl/posts/2026/04/CVE-2026-40550"},{"url":"https://www.mpgabinet.pl"},{"url":"https://github.com/advisories/GHSA-4r5q-f55r-9frx"}],"sources":{"cve":[{"id":"CVE-2026-40551","title":"Use of Client-Side Authentication in multiple BinSoft products","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.  \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.","status":"published","published":"2026-04-28T13:13:21.692Z","modified":"2026-09-30T11:18:14.854Z","cvss":[{"version":"4.0","score":8.4,"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","level":"high","assessor":"cna"}],"cwes":["CWE-603"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-26045","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.  \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.","status":"published","published":"2026-04-28T13:13:21Z","modified":"2026-09-30T11:18:14Z","cvss":[{"version":"4.0","score":8.4,"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","level":"high"}],"updated_at":"2026-11-02T17:27:50.183381Z"}],"ghsa":[{"id":"GHSA-4r5q-f55r-9frx","title":"mpGabinet performs client-side authentication. An attacker with access to any application...","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.  \n\nThis issue affects mpGabinet version 23.12.19 and below.","status":"published","published":"2026-04-28T15:30:50Z","modified":"2026-09-30T12:35:10Z","cvss":[{"version":"4.0","score":8.4,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-603"],"updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-40551","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.  \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.","status":"published","published":"2026-04-28T14:16:13.51Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":8.4,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-603"],"updated_at":"2026-11-02T14:12:16.252509Z"}]}}