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CVE-2020-2501

Estado: ModificadaCrítica (9.8)—

A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Qnap — Surveillance Station

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-2501",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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": "security@qnapsecurity.com.tw",
      "affectedData": [
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Surveillance Station",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.1.5.4.3",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS)"
          ]
        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Surveillance Station",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.1.5.3.3",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS) ."
          ]
        }
      ]
    }
  ],
  "published": "2021-02-17T04:15:12.513",
  "references": [
    {
      "url": "https://www.qnap.com/en/security-advisory/qsa-21-07",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@qnapsecurity.com.tw"
    },
    {
      "url": "https://www.qnap.com/en/security-advisory/qsa-21-07",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@qnapsecurity.com.tw",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)"
    },
    {
      "lang": "es",
      "value": "Se ha reportado una vulnerabilidad de desbordamiento del búfer en la región stack de la memoria que afecta a los dispositivos NAS de QNAP que ejecutan Surveillance Station. Si es explotada, esta vulnerabilidad permite a atacantes ejecutar código arbitrario. QNAP ya ha corregido esta vulnerabilidad en las siguientes versiones: Surveillance Station versiones 5.1.5.4.3 (y posterior) para ARM CPU NAS (SO de 64 bits) y x86 CPU NAS (SO de 64 bits) Surveillance Station versiones 5.1.5.3.3 (y posterior) para ARM CPU NAS (sistema operativo de 32 bits) y CPU NAS x86 (sistema operativo de 32 bits)"
    }
  ],
  "lastModified": "2026-06-17T03:12:14.440",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "5.1.5.3.3"
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          "operator": "OR"
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  "sourceIdentifier": "security@qnapsecurity.com.tw"
}