Vulnerability-Lookup

JVNDB-2026-000051

Vulnerability from jvndb - Published: 2026-04-20 14:47 - Updated:2026-04-20 14:47

Severity ?

7.8 (High) - cvssV3_0 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

SKYSEA Client View and SKYMEC IT Manager improper file access permission settings

Details

SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. are Enterprise IT Asset Management Tools. SKYSEA Client View and SKYMEC IT Manager contain the following vulnerability.

Incorrect default permissions in the installation folder (CWE-276) - CVE-2026-39454

Takashi Matsumoto of NEC Corporation reported this vulnerability to Sky Co.,LTD. and coordinated. After the coordination was completed, Sky Co.,LTD. reported the case to JPCERT/CC to notify users of the solution through JVN.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN63376363/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-39454
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	Sky Co., LTD.	SKYMEC IT Manager
	Sky Co., LTD.	SKYSEA Client View

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000051.html",
  "dc:date": "2026-04-20T14:47+09:00",
  "dcterms:issued": "2026-04-20T14:47+09:00",
  "dcterms:modified": "2026-04-20T14:47+09:00",
  "description": "SKYSEA Client View and SKYMEC IT Manager provided by Sky Co.,LTD. are Enterprise IT Asset Management Tools.\r\nSKYSEA Client View and SKYMEC IT Manager contain the following vulnerability.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/276.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eIncorrect default permissions in the installation folder (CWE-276) - CVE-2026-39454\u003c/li\u003e\u003c/ul\u003eTakashi Matsumoto of NEC Corporation reported this vulnerability to Sky Co.,LTD. and coordinated. After the coordination was completed, Sky Co.,LTD. reported the case to JPCERT/CC to notify users of the solution through JVN.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000051.html",
  "sec:cpe": [
    {
      "#text": "cpe:/a:skygroup:skymec_it_manager",
      "@product": "SKYMEC IT Manager",
      "@vendor": "Sky Co., LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:skygroup:skysea_client_view",
      "@product": "SKYSEA Client View",
      "@vendor": "Sky Co., LTD.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": {
    "@score": "7.8",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000051",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN63376363/index.html",
      "@id": "JVN#63376363",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-39454",
      "@id": "CVE-2026-39454",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "SKYSEA Client View and SKYMEC IT Manager improper file access permission settings"
}

CVE-2026-39454 (GCVE-0-2026-39454)

Vulnerability from cvelistv5 – Published: 2026-04-20 08:04 – Updated: 2026-04-20 13:28

Summary

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.

Severity ?

7.8 (High)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.5 (High)


                        
                          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

CWE

CWE-276 - Incorrect default permissions

Assigner

jpcert

References

URL

Tags

	https://www.skyseaclientview.net/news/260420_01/
	https://jvn.jp/en/jp/JVN63376363/

Impacted products

Vendor

Product

Version

Sky Co.,LTD.

SKYSEA Client View

Affected: Ver.21.200.07j and earlier

Sky Co.,LTD.

SKYMEC IT Manager

Affected: Ver.2024.005.10a and earlier

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-39454",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-20T13:28:48.426227Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-20T13:28:56.536Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "SKYSEA Client View",
          "vendor": "Sky Co.,LTD.",
          "versions": [
            {
              "status": "affected",
              "version": "Ver.21.200.07j and earlier"
            }
          ]
        },
        {
          "product": "SKYMEC IT Manager",
          "vendor": "Sky Co.,LTD.",
          "versions": [
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              "status": "affected",
              "version": "Ver.2024.005.10a and earlier"
            }
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      "descriptions": [
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          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_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",
            "version": "3.0"
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          "scenarios": [
            {
              "lang": "en-US",
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        },
        {
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            "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",
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-20T08:04:56.595Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.skyseaclientview.net/news/260420_01/"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN63376363/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
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    "datePublished": "2026-04-20T08:04:56.595Z",
    "dateReserved": "2026-04-08T11:15:40.304Z",
    "dateUpdated": "2026-04-20T13:28:56.536Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

JVNDB-2026-000051

CVE-2026-39454 (GCVE-0-2026-39454)

Tags

Sightings

Nomenclature