Vulnerability-Lookup

FKIE_CVE-2025-66281

Vulnerability from fkie_nvd - Published: 2026-06-10 04:17 - Updated: 2026-07-23 09:10

Severity

7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later

References

	URL	Tags
	security@qnapsecurity.com.tw	https://www.qnap.com/en/security-advisory/qsa-26-10	Broken Link, Vendor Advisory

Impacted products

Vendor	Product	Version
qnap	qts	*
qnap	quts_hero	*
qnap	quts_hero	*
qnap	quts_hero	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "QTS",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "5.2.9.3410 build 20260214",
              "status": "affected",
              "version": "5.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "QuTS hero",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "h5.2.9.3410 build 20260214",
              "status": "affected",
              "version": "h5.2.0",
              "versionType": "custom"
            },
            {
              "lessThan": "h5.3.4.3500 build 20260520",
              "status": "affected",
              "version": "h5.3.0",
              "versionType": "custom"
            },
            {
              "lessThan": "h6.0.0.3397 build 20260206",
              "status": "affected",
              "version": "?",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@qnapsecurity.com.tw"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1A317C8F-BB90-4EB6-96D4-C3FC65BC0D2C",
              "versionEndExcluding": "5.2.9.3410",
              "versionStartIncluding": "5.2.0.2737",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6446921C-0F3B-45DC-85B3-9EA8066E726E",
              "versionEndExcluding": "h5.2.9.3410",
              "versionStartIncluding": "h5.2.0.2737",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "24358BA7-15BD-439B-A17A-A62C027C68CB",
              "versionEndExcluding": "h5.3.4.3500",
              "versionStartIncluding": "h5.3.0.3115",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "66E59962-660C-4947-98B2-2D5CE78FDF5F",
              "versionEndExcluding": "h6.0.0.3397",
              "versionStartIncluding": "h6.0.0.3324",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.4.3500 build 20260520 and later\nQuTS hero h6.0.0.3397 build 20260206 and later"
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desreferencia de puntero NULL ha sido reportada que afecta a varias versiones del sistema operativo QNAP. Los atacantes remotos pueden entonces explotar la vulnerabilidad para lanzar un ataque de denegaci\u00f3n de servicio (DoS).\n\nYa hemos corregido la vulnerabilidad en las siguientes versiones:\nQTS 5.2.9.3410 build 20260214 y posteriores\nQuTS hero h5.2.9.3410 build 20260214 y posteriores\nQuTS hero h5.3.4.3500 build 20260520 y posteriores\nQuTS hero h6.0.0.3397 build 20260206 y posteriores"
    }
  ],
  "id": "CVE-2025-66281",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "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:N/PR:N/UI:N/VC:N/VI:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@qnapsecurity.com.tw",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-66281",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-10T15:49:55.156148Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-10T04:17:14.383",
  "references": [
    {
      "source": "security@qnapsecurity.com.tw",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ],
      "url": "https://www.qnap.com/en/security-advisory/qsa-26-10"
    }
  ],
  "sourceIdentifier": "security@qnapsecurity.com.tw",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "security@qnapsecurity.com.tw",
      "type": "Secondary"
    }
  ]
}

CVE-2025-66281 (GCVE-0-2025-66281)

Vulnerability from cvelistv5 – Published: 2026-06-10 03:06 – Updated: 2026-06-10 15:50

Title

QTS, QuTS hero

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476

Assigner

qnap

References

1 reference

URL	Tags
https://www.qnap.com/en/security-advisory/qsa-26-10

Impacted products

2 products

Vendor	Product	Version
QNAP Systems Inc.	QTS	Affected: 5.2.0 , < 5.2.9.3410 build 20260214 (custom)
QNAP Systems Inc.	QuTS hero	Affected: h5.2.0 , < h5.2.9.3410 build 20260214 (custom) Affected: h5.3.0 , < h5.3.4.3500 build 20260520 (custom) Affected: ? , < h6.0.0.3397 build 20260206 (custom)

Credits

Bechir Bouali (@b3ch1r) from SecLab - TII

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-66281",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T15:49:55.156148Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T15:50:06.023Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "QTS",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "5.2.9.3410 build 20260214",
              "status": "affected",
              "version": "5.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "QuTS hero",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "h5.2.9.3410 build 20260214",
              "status": "affected",
              "version": "h5.2.0",
              "versionType": "custom"
            },
            {
              "lessThan": "h5.3.4.3500 build 20260520",
              "status": "affected",
              "version": "h5.3.0",
              "versionType": "custom"
            },
            {
              "lessThan": "h6.0.0.3397 build 20260206",
              "status": "affected",
              "version": "?",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Bechir Bouali (@b3ch1r) from SecLab - TII"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\u003cbr\u003e\u003cbr\u003eWe have already fixed the vulnerability in the following versions:\u003cbr\u003eQTS 5.2.9.3410 build 20260214 and later\u003cbr\u003eQuTS hero h5.2.9.3410 build 20260214 and later\u003cbr\u003eQuTS hero h5.3.4.3500 build 20260520 and later\u003cbr\u003eQuTS hero h6.0.0.3397 build 20260206 and later\u003cbr\u003e"
            }
          ],
          "value": "A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.4.3500 build 20260520 and later\nQuTS hero h6.0.0.3397 build 20260206 and later"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-129",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-129"
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "UNREPORTED",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476",
              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-10T03:06:06.429Z",
        "orgId": "2fd009eb-170a-4625-932b-17a53af1051f",
        "shortName": "qnap"
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      "references": [
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          "url": "https://www.qnap.com/en/security-advisory/qsa-26-10"
        }
      ],
      "solutions": [
        {
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "We have already fixed the vulnerability in the following versions:\u003cbr\u003eQTS 5.2.9.3410 build 20260214 and later\u003cbr\u003eQuTS hero h5.2.9.3410 build 20260214 and later\u003cbr\u003eQuTS hero h5.3.4.3500 build 20260520 and later\u003cbr\u003eQuTS hero h6.0.0.3397 build 20260206 and later\u003cbr\u003e"
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        }
      ],
      "source": {
        "advisory": "QSA-26-10",
        "discovery": "EXTERNAL"
      },
      "title": "QTS, QuTS hero",
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  },
  "cveMetadata": {
    "assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f",
    "assignerShortName": "qnap",
    "cveId": "CVE-2025-66281",
    "datePublished": "2026-06-10T03:06:06.429Z",
    "dateReserved": "2025-11-26T09:25:37.833Z",
    "dateUpdated": "2026-06-10T15:50:06.023Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

FKIE_CVE-2025-66281

CVE-2025-66281 (GCVE-0-2025-66281)

Tags

Sightings

Nomenclature