Medium severity · published Aug 29, 2025
CVE-2025-30271
QTS, QuTS hero
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
A path traversal vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.
We have already fixed the vulnerability in the following versions:
QTS 5.2.5.3145 build 20250526 and later
QuTS hero h5.2.5.3138 build 20250519 and later
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
QTS · QNAP Systems Inc.
5.2.x before 5.2.5.3145 build 20250526 · source: vendor, NVD
QH
QuTS hero · QNAP Systems Inc.
h5.2.x before h5.2.5.3138 build 20250519 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-30271
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-30271
Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-25-21
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CVE-2025-66276
QuTS hero is not affected