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CVE-2026-41539

A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3500 build 20260520 and later
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c5495ad3ddd1ce98c86324aad77b9a143ba5f62d4eedb7ea5caa3c2897287672
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":"QTS","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"5.2.9.3492 build 20260507","status":"affected","version":"5.2.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"QuTS hero","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"h5.2.9.3499 build 20260514","status":"affected","version":"h5.2.0","versionType":"custom"},{"lessThan":"h5.3.4.3500 build 20260520","status":"affected","version":"h5.3.0","versionType":"custom"},{"lessThan":"h6.0.0.3500 build 20260520","status":"affected","version":"?","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"QTS","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"5.2.9.3492 build 20260507","status":"affected","version":"5.2.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"QuTS hero","vendor":"QNAP Systems Inc.","versions":[{"lessThan":"h5.2.9.3499 build 20260514","status":"affected","version":"h5.2.0","versionType":"custom"},{"lessThan":"h5.3.4.3500 build 20260520","status":"affected","version":"h5.3.0","versionType":"custom"},{"lessThan":"h6.0.0.3500 build 20260520","status":"affected","version":"?","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"UNREPORTED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityI…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /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:v2:0562c466d6b4984022cbee93aacc60be823aadec31f19c92f5ab7bb6b0620eb3 · sha256:a95f110dabd58e88… · /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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