CVE-2026-86405

Status: DeferredCritical (9.8)—

Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module allows Signature Spoofing by Improper Validation.

This issue affects PrestaShop Virtual POS Module: from 26.8.1 before 26.9.1.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 9.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.20%
Percentile among all scored CVEs: 9
Score date: 10/17/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access92 %
Secondary impactT1565.002 Transmitted Data Manipulationimpact75 %

AV:N/PR:N/UI:N indica exposición web remota sin autenticación; CWE-347 (firma criptográfica impropia) permite suplantar identidades y manipular transacciones de pago mediante falsificación de firma.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Encrypt Sensitive Information

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Sipay — Prestashop Virtual POS Module^AI

CWEs

CWE-347

References

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1287

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-86405",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-86405",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-12T22:48:31.496815Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "iletisim@usom.gov.tr",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "iletisim@usom.gov.tr",
      "affectedData": [
        {
          "vendor": "Sipay Electronic Money and Payment Services Inc.",
          "product": "PrestaShop Virtual POS Module",
          "versions": [
            {
              "status": "affected",
              "version": "26.8.1",
              "lessThan": "26.9.1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-09T13:17:11.100",
  "references": [
    {
      "url": "https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1287",
      "source": "iletisim@usom.gov.tr"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "iletisim@usom.gov.tr",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module allows Signature Spoofing by Improper Validation.\n\nThis issue affects PrestaShop Virtual POS Module: from 26.8.1 before 26.9.1."
    }
  ],
  "lastModified": "2026-10-12T23:17:45.413",
  "sourceIdentifier": "iletisim@usom.gov.tr"
}