{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39454", "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "state": "PUBLISHED", "assignerShortName": "jpcert", "dateReserved": "2026-04-08T11:15:40.304Z", "datePublished": "2026-04-20T08:04:56.595Z", "dateUpdated": "2026-04-20T13:28:56.536Z"}, "containers": {"cna": {"affected": [{"vendor": "Sky Co.,LTD.", "product": "SKYSEA Client View", "versions": [{"version": "Ver.21.200.07j and earlier", "status": "affected"}]}, {"vendor": "Sky Co.,LTD.", "product": "SKYMEC IT Manager", "versions": [{"version": "Ver.2024.005.10a and earlier", "status": "affected"}]}], "descriptions": [{"lang": "en", "value": "SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. configure the installation folder with improper file access permission settings. A non-administrative user may manipulate and/or place arbitrary files within the installation folder of the product. As a result, arbitrary code may be executed with the administrative privilege."}], "problemTypes": [{"descriptions": [{"description": "Incorrect default permissions", "lang": "en-US", "cweId": "CWE-276", "type": "CWE"}]}], "references": [{"url": "https://www.skyseaclientview.net/news/260420_01/"}, {"url": "https://jvn.jp/en/jp/JVN63376363/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_0": {"version": "3.0", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.5, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "providerMetadata": {"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert", "dateUpdated": "2026-04-20T08:04:56.595Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-20T13:28:48.426227Z", "id": "CVE-2026-39454", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-20T13:28:56.536Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-39454", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-20T13:28:48.426227Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-20T13:28:52.399Z"}}], "cna": {"metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en-US", "value": "GENERAL"}]}, {"format": "CVSS", "cvssV4_0": {"version": "4.0", "baseScore": 8.5, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}, "scenarios": [{"lang": "en-US", "value": "GENERAL"}]}], "affected": [{"vendor": "Sky Co.,LTD.", "product": "SKYSEA Client View", "versions": [{"status": "affected", "version": "Ver.21.200.07j and earlier"}]}, {"vendor": "Sky Co.,LTD.", "product": "SKYMEC IT Manager", "versions": [{"status": "affected", "version": "Ver.2024.005.10a and earlier"}]}], "references": [{"url": "https://www.skyseaclientview.net/news/260420_01/"}, {"url": "https://jvn.jp/en/jp/JVN63376363/"}], "descriptions": [{"lang": "en", "value": "SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. configure the installation folder with improper file access permission settings. A non-administrative user may manipulate and/or place arbitrary files within the installation folder of the product. As a result, arbitrary code may be executed with the administrative privilege."}], "problemTypes": [{"descriptions": [{"lang": "en-US", "type": "CWE", "cweId": "CWE-276", "description": "Incorrect default permissions"}]}], "providerMetadata": {"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert", "dateUpdated": "2026-04-20T08:04:56.595Z"}}}, "cveMetadata": {"cveId": "CVE-2026-39454", "state": "PUBLISHED", "dateUpdated": "2026-04-20T13:28:56.536Z", "dateReserved": "2026-04-08T11:15:40.304Z", "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "datePublished": "2026-04-20T08:04:56.595Z", "assignerShortName": "jpcert"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:skygroup:skymec_it_manager:*:*:*:*:*:*:*:*", "matchCriteriaId": "3CB060C8-F036-47AB-A9F8-2F8FF43A9A87", "versionEndIncluding": "2024.005.10a", "vulnerable": true}, {"criteria": "cpe:2.3:a:skygroup:skysea_client_view:*:*:*:*:*:*:*:*", "matchCriteriaId": "1079899A-7EA5-4ECB-8212-23DC5A1248CA", "versionEndIncluding": "21.200.07j", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. configure the installation folder with improper file access permission settings. A non-administrative user may manipulate and/or place arbitrary files within the installation folder of the product. As a result, arbitrary code may be executed with the administrative privilege."}], "id": "CVE-2026-39454", "lastModified": "2026-05-12T15:28:23.977", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "vultures@jpcert.or.jp", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "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:L/AC:L/AT:N/PR:L/UI:N/VC:H/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": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vultures@jpcert.or.jp", "type": "Secondary"}]}, "published": "2026-04-20T09:16:08.933", "references": [{"source": "vultures@jpcert.or.jp", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN63376363/"}, {"source": "vultures@jpcert.or.jp", "tags": ["Vendor Advisory"], "url": "https://www.skyseaclientview.net/news/260420_01/"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-276"}], "source": "vultures@jpcert.or.jp", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-863"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2024.005.10a]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "SKYMEC IT Manager", "source": "cna", "vendor": "Sky Co.,LTD."}, "product": "skymec_it_manager", "vendor": "skygroup"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,21.200.07j]"}}], "enrichment": {"confidence": 88.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 88.0, "source": "matching"}]}, "original": {"product": "SKYSEA Client View", "source": "cna", "vendor": "Sky Co.,LTD."}, "product": "skysea_client_view", "vendor": "skygroup"}], "created": "2026-04-20T09:30:03.368547+00:00", "title": "Improper File Permissions Enable Arbitrary Code Execution", "updated": "2026-05-12T17:00:11.994136+00:00", "vendors": ["skygroup", "skygroup$PRODUCT$skymec_it_manager", "skygroup$PRODUCT$skysea_client_view"]}