EUVD-2025-17332
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
An improper certificate validation vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.4847 and later
Analysis
CVE-2025-30279 is an improper certificate validation vulnerability in QNAP File Station 5 that allows authenticated remote attackers to compromise system confidentiality, integrity, and availability. Affected versions are below 5.5.6.4847; the vulnerability requires valid user credentials but no user interaction, making it a significant post-authentication attack vector with a CVSS score of 8.8 indicating high severity.
Technical Context
This vulnerability stems from improper X.509 certificate validation (CWE-295), a critical flaw in SSL/TLS certificate verification mechanisms. File Station 5, a file management service on QNAP NAS systems, fails to properly validate certificates during secure communications, potentially allowing man-in-the-middle (MITM) attacks or bypass of authentication controls. The root cause involves inadequate implementation of certificate chain validation, hostname verification, or certificate pinning mechanisms. An authenticated attacker can exploit this to intercept, modify, or forge secure communications, leading to complete system compromise including unauthorized data access, modification, and service disruption.
Affected Products
QNAP File Station 5 versions below 5.5.6.4847 are affected. Specific CPE: cpe:2.3:a:qnap:file_station_5:*:*:*:*:*:*:*:* (versions < 5.5.6.4847). File Station 5 is a core component of QNAP NAS systems running applicable firmware versions. Affected installations include any QNAP NAS device with File Station 5 enabled and running vulnerable versions. The vendor advisory indicates the fix is available in File Station 5 version 5.5.6.4847 and all subsequent releases.
Remediation
Immediate remediation requires upgrading File Station 5 to version 5.5.6.4847 or later. Organizations should: (1) Apply the vendor patch immediately to all affected QNAP NAS systems; (2) Verify patch deployment through QNAP management interfaces; (3) Review user account access logs for suspicious activities during the vulnerability window; (4) Implement network segmentation to restrict File Station access to trusted networks; (5) Monitor certificate validation errors in system logs; (6) Consider temporary service restrictions until patching is complete. No workarounds are documented; patching is the primary mitigation path. Refer to QNAP's official security advisory for detailed patch deployment procedures and rollback guidance.
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External POC / Exploit Code
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