CVE-2026-5525

{
  "id": "CVE-2026-5525",
  "sourceIdentifier": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
  "published": "2026-04-10T08:16:26.067",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN)."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de búfer basado en pila existe en Notepad++ versión 8.9.3 en el componente gestor de soltar archivos. Cuando un usuario arrastra y suelta una ruta de directorio de exactamente 259 caracteres sin una barra invertida final, la aplicación añade una barra invertida y un terminador nulo sin una comprobación de límites adecuada, lo que resulta en un desbordamiento de búfer de pila y un fallo de la aplicación (STATUS_STACK_BUFFER_OVERRUN)."
    }
  ],
  "affected": [
    {
      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
      "affectedData": [
        {
          "vendor": "Notepad++ Project",
          "product": "Notepad++",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8.9.3",
              "status": "affected"
            },
            {
              "version": "8.9.4",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N",
          "baseScore": 6.0,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 5.2
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-10T12:49:53.116510Z",
          "id": "CVE-2026-5525",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:notepad-plus-plus:notepad\\+\\+:8.9.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "C8130B60-1945-4683-9267-16AE16685649"
            }
          ]
        }
      ]
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  ],
  "references": [
    {
      "url": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0",
      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921",
      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930",
      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}