CVE-2026-40551 (GCVE-0-2026-40551)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:13 – Updated: 2026-04-28 14:16 Unsupported When Assigned
VLAI?
Title
Use of Client-Side Authentication in mpGabinet
Summary
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.
Severity ?
8.4 (High)
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
CWE
  • CWE-603 - Use of Client-Side Authentication
Assigner
References
Impacted products
Vendor Product Version
BinSoft mpGabinet Affected: 0 , ≤ 23.12.19 (semver)
Create a notification for this product.
Credits
Robert Kruczek Kamil Szczurowski
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40551",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-28T14:16:07.976794Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-28T14:16:14.744Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "mpGabinet",
          "vendor": "BinSoft",
          "versions": [
            {
              "lessThanOrEqual": "23.12.19",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Application has to be\u0026nbsp;authenticated to the backend server prior to the attack"
            }
          ],
          "value": "Application has to be\u00a0authenticated to the backend server prior to the attack"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Robert Kruczek"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Kamil Szczurowski"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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.  \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThis issue affects mpGabinet version 23.12.19 and below.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-603",
              "description": "CWE-603: Use of Client-Side Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-28T13:13:21.692Z",
        "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "shortName": "CERT-PL"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://cert.pl/posts/2026/04/CVE-2026-40550/"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.mpgabinet.pl/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "tags": [
        "unsupported-when-assigned"
      ],
      "title": "Use of Client-Side Authentication in mpGabinet",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
    "assignerShortName": "CERT-PL",
    "cveId": "CVE-2026-40551",
    "datePublished": "2026-04-28T13:13:21.692Z",
    "dateReserved": "2026-04-14T09:44:32.552Z",
    "dateUpdated": "2026-04-28T14:16:14.744Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-40551",
      "date": "2026-05-10",
      "epss": "0.00024",
      "percentile": "0.06802"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-40551\",\"sourceIdentifier\":\"cvd@cert.pl\",\"published\":\"2026-04-28T14:16:13.510\",\"lastModified\":\"2026-04-28T20:20:09.767\",\"vulnStatus\":\"Deferred\",\"cveTags\":[{\"sourceIdentifier\":\"cvd@cert.pl\",\"tags\":[\"unsupported-when-assigned\"]}],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cvd@cert.pl\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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/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\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"cvd@cert.pl\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-603\"}]}],\"references\":[{\"url\":\"https://cert.pl/posts/2026/04/CVE-2026-40550/\",\"source\":\"cvd@cert.pl\"},{\"url\":\"https://www.mpgabinet.pl/\",\"source\":\"cvd@cert.pl\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"affected\": [{\"defaultStatus\": \"affected\", \"product\": \"mpGabinet\", \"vendor\": \"BinSoft\", \"versions\": [{\"lessThanOrEqual\": \"23.12.19\", \"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\"}]}], \"configurations\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"Application has to be\u0026nbsp;authenticated to the backend server prior to the attack\"}], \"value\": \"Application has to be\\u00a0authenticated to the backend server prior to the attack\"}], \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Robert Kruczek\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Kamil Szczurowski\"}], \"descriptions\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"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.  \u003cbr\u003e\u003cbr\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eThis issue affects mpGabinet version 23.12.19 and below.\u003c/span\u003e\u003cbr\u003e\"}], \"value\": \"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.\"}], \"metrics\": [{\"cvssV4_0\": {\"Automatable\": \"NOT_DEFINED\", \"Recovery\": \"NOT_DEFINED\", \"Safety\": \"NOT_DEFINED\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"attackVector\": \"LOCAL\", \"baseScore\": 8.4, \"baseSeverity\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"providerUrgency\": \"NOT_DEFINED\", \"subAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"valueDensity\": \"NOT_DEFINED\", \"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\", \"version\": \"4.0\", \"vulnAvailabilityImpact\": \"LOW\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-603\", \"description\": \"CWE-603: Use of Client-Side Authentication\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"orgId\": \"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6\", \"shortName\": \"CERT-PL\", \"dateUpdated\": \"2026-04-28T13:13:21.692Z\"}, \"references\": [{\"tags\": [\"third-party-advisory\"], \"url\": \"https://cert.pl/posts/2026/04/CVE-2026-40550/\"}, {\"tags\": [\"product\"], \"url\": \"https://www.mpgabinet.pl/\"}], \"source\": {\"discovery\": \"EXTERNAL\"}, \"tags\": [\"unsupported-when-assigned\"], \"title\": \"Use of Client-Side Authentication in mpGabinet\", \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-40551\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-28T14:16:07.976794Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-28T14:16:10.502Z\"}}]}",
      "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\": \"2026-04-28T14:16:14.744Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.