NULL pointer dereference in QNAP File Station
CVE-2025-54163
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5166 and later
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- QNAP File Station
- QNAP Systems Inc. File Station 5 — versions 5.5.x
Weakness classification (CWE)
References
- www.qnap.com/en/security-advisory/qsa-26-03 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-54163?
- CVE-2025-54163 is a medium-severity vulnerability in QNAP File Station, classified under NULL Pointer Dereference. CVSS score: 4.9/10. Published 2026-02-11.
- How severe is CVE-2025-54163?
- Medium severity. CVSS v3 base score is 4.9 out of 10.