{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-26243", "assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f", "state": "PUBLISHED", "assignerShortName": "qnap", "dateReserved": "2026-02-12T02:21:35.483Z", "datePublished": "2026-10-15T09:29:27.642Z", "dateUpdated": "2026-10-15T13:37:30.842Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "2fd009eb-170a-4625-932b-17a53af1051f", "shortName": "qnap", "dateUpdated": "2026-10-15T09:29:27.642Z"}, "title": "Arbitrary Folder Deletion in Qsync Central 5.0.0.5", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-22", "description": "CWE-22", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-126", "descriptions": [{"lang": "en", "value": "CAPEC-126"}]}], "affected": [{"vendor": "QNAP Systems Inc.", "product": "Qsync Central", "versions": [{"status": "affected", "version": "5.0.x", "lessThan": "5.0.0.6", "versionType": "custom"}, {"status": "affected", "version": "5.1.x", "lessThan": "5.1.0.2", "versionType": "custom"}, {"status": "affected", "version": "5.2.x", "lessThan": "5.2.0.4", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.\n\nWe have already fixed the vulnerability in the following version:\nQsync Central 5.0.0.6 and later\nQsync Central 5.1.0.2 and later\nQsync Central 5.2.0.4 and later", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.<br><br>We have already fixed the vulnerability in the following version:<br>Qsync Central 5.0.0.6 and later<br>Qsync Central 5.1.0.2 and later<br>Qsync Central 5.2.0.4 and later"}]}], "references": [{"url": "https://www.qnap.com/en/app-release-notes?keyword=Qsync%20&app=QsyncServer&product-line=nas", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.2, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "We have already fixed the vulnerability in the following version:\nQsync Central 5.0.0.6 and later\nQsync Central 5.1.0.2 and later\nQsync Central 5.2.0.4 and later", "supportingMedia": [{"type": "text/html", "base64": false, "value": "We have already fixed the vulnerability in the following version:<br>Qsync Central 5.0.0.6 and later<br>Qsync Central 5.1.0.2 and later<br>Qsync Central 5.2.0.4 and later"}]}], "credits": [{"lang": "en", "value": "coral", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "QNAP PSIRT cve_tool 0.1"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-15T13:37:20.476589Z", "id": "CVE-2026-26243", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T13:37:30.842Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Qsync Central", "vendor": "QNAP Systems Inc.", "versions": [{"lessThan": "5.0.0.6", "status": "affected", "version": "5.0.x", "versionType": "custom"}, {"lessThan": "5.1.0.2", "status": "affected", "version": "5.1.x", "versionType": "custom"}, {"lessThan": "5.2.0.4", "status": "affected", "version": "5.2.x", "versionType": "custom"}]}], "source": "security@qnapsecurity.com.tw"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.\n\nWe have already fixed the vulnerability in the following version:\nQsync Central 5.0.0.6 and later\nQsync Central 5.1.0.2 and later\nQsync Central 5.2.0.4 and later"}], "id": "CVE-2026-26243", "lastModified": "2026-10-15T10:17:12.770", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@qnapsecurity.com.tw", "type": "Secondary"}]}, "published": "2026-10-15T10:17:12.770", "references": [{"source": "security@qnapsecurity.com.tw", "url": "https://www.qnap.com/en/app-release-notes?keyword=Qsync%20&app=QsyncServer&product-line=nas"}], "sourceIdentifier": "security@qnapsecurity.com.tw", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security@qnapsecurity.com.tw", "type": "Primary"}]}

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