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VulnerabilityPublished Updated

CVE-2025-59381: QNAP Systems QTS · Path Traversal

Affects QNAP Systems QTSSource CVE Database V5

0

Not known to be exploited · CVSS 6.9 Medium : upgrade to 5.2.8.3332 build 20251128 when convenient.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.2.8.3332 build 20251128, h5.3.2.3354 build 20251225, h5.2.8.3321 build 20251117
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade QTS to 5.2.8.3332 build 20251128; QuTS hero to h5.3.2.3354 build 20251225 or h5.2.8.3321 build 20251117.

Affected software

ProductAffectedFixed in
QNAP Systems Inc.QTSAffected
  • =5.2.0
Fixed in
  • 5.2.8.3332 build 20251128
QNAP Systems Inc.QuTS heroAffected
  • ≥ h5.2.0, < h5.2.8.3321 build 20251117
  • ≥ h5.3.0, < h5.3.2.3354 build 20251225
Fixed in
  • h5.3.2.3354 build 20251225
  • h5.2.8.3321 build 20251117

AI-suggested

Apply the official patches released by QNAP in QTS 5.2.8.3332 build 20251128 and later, QuTS hero h5.2.8.3321 build 20251117 and later, or QuTS hero h5.3.2.3354 build 20251225 and later. Upgrading to these fixed versions will remediate the vulnerability. No other mitigation or workaround is indicated by the vendor advisory.

Description

CVE-2025-59381 is a path traversal vulnerability in QNAP Systems Inc. QTS operating system. It allows a remote attacker with administrator privileges to read unauthorized files or system data. The vulnerability affects certain QTS and QuTS hero versions prior to the fixed releases. The issue has a medium severity rating with a CVSS score of 6.9. Official fixes have been released in QTS 5.2.8.3332 build 20251128 and later, QuTS hero h5.2.8.3321 build 20251117 and later, and QuTS hero h5.3.2.3354 build 20251225 and later.

References

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