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CVE-2025-66281

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4493c655251d715aec054bdf1e99dcee96d6be42ee590b094904f8f36397d821
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"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"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"QTS","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"5.2.9.3410 build 20260214","status":"affected","version":"5.2.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"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"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"QTS","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"5.2.9.3410 build 20260214","status":"affected","version":"5.2.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://www.qnap.com/en/security-advisory/qsa-26-10"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:56480e2d7372ad0d361b5b29b45d69d38605a5df93299f2c873068c49577c79c · sha256:5005c044eb5e6468… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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