NULL pointer dereference in QNAP File Station
CVE-2025-52865
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user 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 5.5.6.5018 and later
EPSS: 0.003 (25.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Qnap File_station
- Qnap Systems Inc. File Station 5 — versions 5.5.x
Weakness classification (CWE)
References
- security@qnapsecurity.com.tw (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-52865?
- CVE-2025-52865 is a medium-severity vulnerability in QNAP File Station, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2025-11-07.
- How severe is CVE-2025-52865?
- Medium severity. CVSS v3 base score is 6.5 out of 10.