File Station 5 path traversal allows remote file read - fixed in 5.5.6.5190
CVE-2025-66278 Published on February 11, 2026
File Station 5
A path traversal vulnerability has been reported to affect File Station 5. 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 version:
File Station 5 5.5.6.5190 and later
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2025-66278 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2025-66278
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Affected Versions
QNAP Systems Inc. File Station 5:- Version 5.5.x and below 5.5.6.5190 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.