CVE-2026-22899: CWE-476 in QNAP Systems Inc. File Station 5
CVE-2026-22899 is a NULL pointer dereference vulnerability in QNAP Systems Inc. File Station 5 that can be exploited by a remote attacker with a user account to cause a denial-of-service (DoS) condition. The issue affects File Station 5 versions prior to 5. 5. 6. 5208. The vulnerability has a medium severity rating with a CVSS score of 5. 3. A fix is available in File Station 5 version 5. 5.
AI Analysis
Technical Summary
This vulnerability (CWE-476) in QNAP File Station 5 involves a NULL pointer dereference that can be triggered remotely by an attacker who has obtained a user account. Exploitation results in a denial-of-service attack against the affected service. The vulnerability affects File Station 5 versions before 5.5.6.5208. The vendor has fixed the issue starting with version 5.5.6.5208.
Potential Impact
Successful exploitation allows an attacker with a user account to cause a denial-of-service condition by triggering a NULL pointer dereference, potentially disrupting availability of the File Station service.
Mitigation Recommendations
Upgrade File Station 5 to version 5.5.6.5208 or later to remediate this vulnerability. No other mitigation guidance is provided by the vendor.
CVE-2026-22899: CWE-476 in QNAP Systems Inc. File Station 5
Description
CVE-2026-22899 is a NULL pointer dereference vulnerability in QNAP Systems Inc. File Station 5 that can be exploited by a remote attacker with a user account to cause a denial-of-service (DoS) condition. The issue affects File Station 5 versions prior to 5. 5. 6. 5208. The vulnerability has a medium severity rating with a CVSS score of 5. 3. A fix is available in File Station 5 version 5. 5.
CVSS v4.0
Score 5.3medium
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 triggered remotely by an attacker who has obtained a user account. Exploitation results in a denial-of-service attack against the affected service. The vulnerability affects File Station 5 versions before 5.5.6.5208. The vendor has fixed the issue starting with version 5.5.6.5208.
Potential Impact
Successful exploitation allows an attacker with a user account to cause a denial-of-service condition by triggering a NULL pointer dereference, potentially disrupting availability of the File Station service.
Mitigation Recommendations
Upgrade File Station 5 to version 5.5.6.5208 or later to remediate this vulnerability. No other mitigation guidance is provided by the vendor.
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: 6/10/2026, 3:40:50 AM
Last enriched: 6/10/2026, 3:56:36 AM
Last updated: 6/10/2026, 6:16:05 AM
Views: 4
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