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PatchSiren cyber security CVE debrief

CVE-2025-59381 QNAP Systems Inc. CVE debrief

A path traversal vulnerability has been reported in several QNAP operating system versions. If a remote attacker gains administrator account privileges, they can exploit the vulnerability to read the contents of unexpected files or system data.

Vendor
QNAP Systems Inc.
Product
QTS
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-02
Original CVE updated
2026-06-09
Advisory published
2026-01-02
Advisory updated
2026-06-09

Who should care

Administrators of QNAP systems, particularly those using affected versions of QTS and QuTS hero, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability, identified as CVE-2025-59381, allows an attacker with administrator privileges to perform a path traversal attack. This could potentially lead to unauthorized access to sensitive files or system data.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to QTS 5.2.8.3332 build 20251128 or later
  • Update to QuTS hero h5.2.8.3321 build 20251117 or later
  • Update to QuTS hero h5.3.2.3354 build 20251225 or later

Evidence notes

The vulnerability has been fixed in the specified versions of QTS and QuTS hero. Users of affected versions should update their systems as soon as possible.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-59381 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-59381

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-59381 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-59381

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.