Vulnerability-Lookup

JVNDB-2026-000109

Vulnerability from jvndb - Published: 2026-08-10 07:37 - Updated:2026-08-10 07:37

Severity

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

Summary

Installer for LINE for Windows insecurely loads Dynamic Link Libraries

Details

The installer for LINE for Windows provided by LY Corporation contains the following vulnerability:

Uncontrolled search path element (CWE-427) - CVE-2026-13133

The CVSS evaluation above assumes that a victim user is directed to download and place a specially crafted DLL file alongside the affected installer and then invoke the installer.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN40467227/index.html
	JVN	https://jvn.jp/en/ta/JVNTA91240916/
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-13133
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

LY Corporation

LINE

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000109.html",
  "dc:date": "2026-08-10T16:37+09:00",
  "dcterms:issued": "2026-08-10T16:37+09:00",
  "dcterms:modified": "2026-08-10T16:37+09:00",
  "description": "The installer for LINE for Windows provided by LY Corporation contains the following vulnerability:\u003ca href=\u0027https://cwe.mitre.org/data/definitions/427.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://www.cve.org/CVERecord?id=CVE-2026-13133\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\r\n\u003cul\u003e\u003cli\u003eUncontrolled search path element (CWE-427) - CVE-2026-13133\u003c/li\u003e\u003cul\u003e\u003cli\u003eThe CVSS evaluation above assumes that a victim user is directed to download and place a specially crafted DLL file alongside the affected installer and then invoke the installer.\u003c/li\u003e\u003c/ul\u003eYukihiro Nakamura reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000109.html",
  "sec:cpe": {
    "#text": "cpe:/a:linecorp:line",
    "@product": "LINE",
    "@vendor": "LY Corporation",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "7.8",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000109",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN40467227/index.html",
      "@id": "JVN#40467227",
      "@source": "JVN"
    },
    {
      "#text": "https://jvn.jp/en/ta/JVNTA91240916/",
      "@id": "JVNTA#91240916",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-13133",
      "@id": "CVE-2026-13133",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Installer for LINE for Windows insecurely loads Dynamic Link Libraries"
}

CVE-2026-13133 (GCVE-0-2026-13133)

Vulnerability from cvelistv5 – Published: 2026-08-10 06:00 – Updated: 2026-08-10 18:02

Summary

A vulnerability has been identified in LineInst.exe (LINE for Windows) prior to version 26.4.0, where Msftedit.dll is loaded via a relative path without a secure DLL search path, allowing a malicious DLL placed in the installer's directory to be loaded ahead of the legitimate System32 copy.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 18:01 UTC

CWE

CWE-427
CWE-427 - Uncontrolled Search Path Element

Assigner

LY-Corporation jpcert root

References

1 reference

URL	Tags
https://line.github.io/security-advisory-blog/CVE…

Impacted products

1 product

Vendor	Product	Version
LY Corporation	LINE for Windows	Unaffected: 26.4.0 , < * (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-13133",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-10T18:01:46.381874Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-427",
                "description": "CWE-427 Uncontrolled Search Path Element",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-10T18:02:03.340Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "LINE for Windows",
          "vendor": "LY Corporation",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "26.4.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in LineInst.exe (LINE for Windows) prior to version 26.4.0, where Msftedit.dll is loaded via a relative path without a secure DLL search path, allowing a malicious DLL placed in the installer\u0027s directory to be loaded ahead of the legitimate System32 copy."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "CWE-427",
              "lang": "en"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-10T06:00:12.020Z",
        "orgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
        "shortName": "LY-Corporation"
      },
      "references": [
        {
          "url": "https://line.github.io/security-advisory-blog/CVE-2026-13133/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
    "assignerShortName": "LY-Corporation",
    "cveId": "CVE-2026-13133",
    "datePublished": "2026-08-10T06:00:12.020Z",
    "dateReserved": "2026-06-24T06:46:44.264Z",
    "dateUpdated": "2026-08-10T18:02:03.340Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.