CVE-2026-22899: CWE-476 in QNAP Systems Inc. File Station 5
A NULL pointer dereference vulnerability has been reported to affect File Station 6. 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 5.5.6.5208 and later
AI Analysis
Technical Summary
This vulnerability (CWE-476) in QNAP File Station 5 involves a NULL pointer dereference that can be exploited by a remote attacker who has obtained a user account. Exploitation results in a denial-of-service attack against the affected service. The vulnerability affects version 5.5.0 and was addressed by QNAP in version 5.5.6.5208 and later.
Potential Impact
Successful exploitation allows an attacker with user-level privileges to cause a denial-of-service condition, disrupting the availability of the File Station service. The CVSS 4.0 base score is 1.3, indicating low severity and limited impact.
Mitigation Recommendations
Upgrade File Station 5 to version 5.5.6.5208 or later, where this vulnerability has been fixed. No other mitigation is indicated.
CVE-2026-22899: CWE-476 in QNAP Systems Inc. File Station 5
Description
A NULL pointer dereference vulnerability has been reported to affect File Station 6. 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 5.5.6.5208 and later
CVSS v4.0
Score 1.3low
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-476) in QNAP File Station 5 involves a NULL pointer dereference that can be exploited by a remote attacker who has obtained a user account. Exploitation results in a denial-of-service attack against the affected service. The vulnerability affects version 5.5.0 and was addressed by QNAP in version 5.5.6.5208 and later.
Potential Impact
Successful exploitation allows an attacker with user-level privileges to cause a denial-of-service condition, disrupting the availability of the File Station service. The CVSS 4.0 base score is 1.3, indicating low severity and limited impact.
Mitigation Recommendations
Upgrade File Station 5 to version 5.5.6.5208 or later, where this vulnerability has been fixed. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- qnap
- Date Reserved
- 2026-01-13T07:49:08.784Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a28dcc28dd33fbd85dba9c5
Added to database: 06/10/2026, 03:40:50 UTC
Last enriched: 06/17/2026, 07:38:16 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 61
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