FKIE_CVE-2026-0809

Vulnerability from fkie_nvd - Published: 2026-03-12 13:16 - Updated: 2026-03-12 21:07
Severity ?
6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
Use of a custom token encoding algorithm in Streamsoft Prestiż software allows the value of the KSeF (Krajowy System e-Faktur) token to be guessed after analyzing how tokens with know values are encoded. This issue was fixed in version 20.0.380.92.
References
cvd@cert.plhttps://cert.pl/posts/2026/03/CVE-2026-0809
cvd@cert.plhttps://www.streamsoft.pl/streamsoft-prestiz/
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use of a custom token encoding algorithm in Streamsoft Presti\u017c software allows\u00a0the value of the KSeF (Krajowy System e-Faktur)\u00a0token to be guessed\u00a0after analyzing how tokens with know values are encoded.\n\nThis issue was fixed in version 20.0.380.92."
    },
    {
      "lang": "es",
      "value": "El uso de un algoritmo de codificaci\u00f3n de tokens personalizado en el software Streamsoft Presti? permite adivinar el valor del token KSeF (Krajowy System e-Faktur) despu\u00e9s de analizar c\u00f3mo se codifican los tokens con valores conocidos.\n\nEste problema se solucion\u00f3 en la versi\u00f3n 20.0.380.92."
    }
  ],
  "id": "CVE-2026-0809",
  "lastModified": "2026-03-12T21:07:53.427",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cvd@cert.pl",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-12T13:16:00.723",
  "references": [
    {
      "source": "cvd@cert.pl",
      "url": "https://cert.pl/posts/2026/03/CVE-2026-0809"
    },
    {
      "source": "cvd@cert.pl",
      "url": "https://www.streamsoft.pl/streamsoft-prestiz/"
    }
  ],
  "sourceIdentifier": "cvd@cert.pl",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-261"
        }
      ],
      "source": "cvd@cert.pl",
      "type": "Primary"
    }
  ]
}


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