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Vulnerabilities

Vulnerability · CVE-2025-66278

A path traversal vulnerability has been reported to affect File Station 5.

Published Feb 11, 2026 · catalog updated Feb 11, 2026 · QNAP Systems Inc. File Station 5

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-66278. EPSS is 0.48%. Act only if a listed version of QNAP Systems Inc. File Station 5 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low1.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.48%
Remediation
Version ranges on file
Affected products
vendor QNAP Systems Inc. File Station 5 5.5.x <5.5.6.5190

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor QNAP Systems Inc. File Station 5 5.5.x <5.5.6.51905.5.x <5.5.6.5190

How to fix CVE-2025-66278

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-66278. EPSS is 0.48%. Act only if a listed version of QNAP Systems Inc. File Station 5 is installed.

Which versions are affected?

Compare what you have installed with QNAP Systems Inc. File Station 5 5.5.x <5.5.6.5190 5.5.x <5.5.6.5190. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.48%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

QNAP QTS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 11, 2026 · EUVD

    Detected

    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

  2. Feb 11, 2026 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-66278

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-66278

    30-day exploitation probability 0.48%

    first.org
  • EUVDVulnerability recordEUVD-2025-206927

    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:

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 3, 2026