CVE-2026-22899

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.qnap.com/en/security-advisory/qsa-26-10

Configurations

Configuration 1 (hide)

cpe:2.3:a:qnap:file_station:*:*:*:*:*:*:*:*

History

23 Jul 2026, 09:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de desreferencia de puntero NULL ha sido reportada que afecta a File Station 6. Si un atacante remoto obtiene una cuenta de usuario, puede entonces explotar la vulnerabilidad para lanzar un ataque de denegación de servicio (DoS). Ya hemos corregido la vulnerabilidad en la siguiente versión: File Station 5 5.5.6.5208 y posteriores

17 Jun 2026, 13:20

Type	Values Removed	Values Added
References	~~{'url': 'https://www.qnap.com/en/security-advisory/qsa-26-19', 'tags': ['Broken Link'], 'source': 'security@qnapsecurity.com.tw'}~~	() https://www.qnap.com/en/security-advisory/qsa-26-10 -

12 Jun 2026, 13:49

Type	Values Removed	Values Added
References	~~() https://www.qnap.com/en/security-advisory/qsa-26-19 -~~	() https://www.qnap.com/en/security-advisory/qsa-26-19 - Broken Link
CPE		cpe:2.3:a:qnap:file_station::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
First Time		Qnap file Station Qnap

10 Jun 2026, 04:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-10 04:17

Updated : 2026-07-23 09:10

NVD link : CVE-2026-22899

Mitre link : CVE-2026-22899

CVE.ORG link : CVE-2026-22899

JSON object : View

Products Affected

qnap

file_station

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2026-22899", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-22899", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-10T15:48:27.435909Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security@qnapsecurity.com.tw", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 1.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "UNREPORTED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@qnapsecurity.com.tw", "affectedData": [{"vendor": "QNAP Systems Inc.", "product": "File Station 5", "versions": [{"status": "affected", "version": "5.5.0", "lessThan": "5.5.6.5208", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-10T04:17:16.270", "references": [{"url": "https://www.qnap.com/en/security-advisory/qsa-26-10", "source": "security@qnapsecurity.com.tw"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@qnapsecurity.com.tw", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nWe have already fixed the vulnerability in the following version:\nFile Station 5 5.5.6.5208 and later"}, {"lang": "es", "value": "Una vulnerabilidad de desreferencia de puntero NULL ha sido reportada que afecta a File Station 6. Si un atacante remoto obtiene una cuenta de usuario, puede entonces explotar la vulnerabilidad para lanzar un ataque de denegaci\u00f3n de servicio (DoS).\n\nYa hemos corregido la vulnerabilidad en la siguiente versi\u00f3n:\nFile Station 5 5.5.6.5208 y posteriores"}], "lastModified": "2026-07-23T09:10:00.113", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qnap:file_station:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C0E422FA-4EF8-4714-AFAF-E7143DBFA2CE", "versionEndExcluding": "5.5.6.5208", "versionStartIncluding": "5.5.6.4691"}], "operator": "OR"}]}], "sourceIdentifier": "security@qnapsecurity.com.tw"}