Vulnerability-Lookup

JVNDB-2026-000059

Vulnerability from jvndb - Published: 2026-04-23 07:57 - Updated:2026-04-23 07:57

Severity

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

Summary

Multiple vulnerabilities in LogonTracer

Details

LogonTracer provided by Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) is a tool to investigate malicious Windows logons by visualizing and analyzing Windows event logs. LogonTracer contains multiple vulnerabilities listed below.

OS command injection (CWE-78) - CVE-2026-33277
Improper neutralization of special elements in data query logic (CWE-943) - CVE-2026-33566

Yuki Matsuhashi reported these vulnerabilities to IPA. JPCERT/CC coordinated internally under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN57877356/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-33277
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-33566
	OS Command Injection(CWE-78)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

JPCERT Coordination Center

LogonTracer

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000059.html",
  "dc:date": "2026-04-23T16:57+09:00",
  "dcterms:issued": "2026-04-23T16:57+09:00",
  "dcterms:modified": "2026-04-23T16:57+09:00",
  "description": "LogonTracer provided by Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) is a tool to investigate malicious Windows logons by visualizing and analyzing Windows event logs.\r\nLogonTracer contains multiple vulnerabilities listed below.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/78.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://cwe.mitre.org/data/definitions/943.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eOS command injection (CWE-78) - CVE-2026-33277\u003c/li\u003e\u003cli\u003eImproper neutralization of special elements in data query logic (CWE-943) - CVE-2026-33566\u003c/li\u003e\u003c/ul\u003eYuki Matsuhashi reported these vulnerabilities to IPA.\r\nJPCERT/CC coordinated internally under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000059.html",
  "sec:cpe": {
    "#text": "cpe:/a:jpcert:logontracer",
    "@product": "LogonTracer",
    "@vendor": "JPCERT Coordination Center",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "8.8",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000059",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN57877356/index.html",
      "@id": "JVN#57877356",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-33277",
      "@id": "CVE-2026-33277",
      "@source": "CVE"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-33566",
      "@id": "CVE-2026-33566",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-78",
      "@title": "OS Command Injection(CWE-78)"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Multiple vulnerabilities in LogonTracer"
}

CVE-2026-33277 (GCVE-0-2026-33277)

Vulnerability from cvelistv5 – Published: 2026-04-27 00:03 – Updated: 2026-04-27 15:32

Summary

An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

Severity

8.8 (High)


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

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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 2026-04-27 15:24 UTC

CWE

CWE-78 - Improper neutralization of special elements used in an OS command ('OS Command Injection')

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.jpcert.or.jp/press/2026/PR20260423.html
https://jvn.jp/en/jp/JVN57877356/

Impacted products

1 product

Vendor	Product	Version
Japan Computer Emergency Response Team Coordination Center (JPCERT/CC)	LogonTracer	Affected: prior to v2.0.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33277",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-27T15:24:12.890674Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-27T15:32:02.563Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "LogonTracer",
          "vendor": "Japan Computer Emergency Response Team Coordination Center (JPCERT/CC)",
          "versions": [
            {
              "status": "affected",
              "version": "prior to v2.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
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            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
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      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-78",
              "description": "Improper neutralization of special elements used in an OS command (\u0027OS Command Injection\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T00:03:41.704Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.jpcert.or.jp/press/2026/PR20260423.html"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN57877356/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-33277",
    "datePublished": "2026-04-27T00:03:41.704Z",
    "dateReserved": "2026-04-21T23:51:22.704Z",
    "dateUpdated": "2026-04-27T15:32:02.563Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-33566 (GCVE-0-2026-33566)

Vulnerability from cvelistv5 – Published: 2026-04-27 00:04 – Updated: 2026-04-27 15:23

Summary

There is a cypher injection issue in LogonTracer prior to v2.0.0. If specially crafted Windows event log data is loaded, the contents of the database may be altered.

Severity

4.3 (Medium)


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

5.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-27 15:16 UTC

CWE

CWE-943 - Improper Neutralization of Special Elements in Data Query Logic

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.jpcert.or.jp/press/2026/PR20260423.html
https://jvn.jp/en/jp/JVN57877356/

Impacted products

1 product

Vendor	Product	Version
Japan Computer Emergency Response Team Coordination Center (JPCERT/CC)	LogonTracer	Affected: prior to v2.0.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33566",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-27T15:16:26.565725Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-27T15:23:56.804Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "LogonTracer",
          "vendor": "Japan Computer Emergency Response Team Coordination Center (JPCERT/CC)",
          "versions": [
            {
              "status": "affected",
              "version": "prior to v2.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "There is a cypher injection issue in LogonTracer prior to v2.0.0. If specially crafted Windows event log data is loaded, the contents of the database may be altered."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-943",
              "description": "Improper Neutralization of Special Elements in Data Query Logic",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T00:04:23.709Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.jpcert.or.jp/press/2026/PR20260423.html"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN57877356/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-33566",
    "datePublished": "2026-04-27T00:04:23.709Z",
    "dateReserved": "2026-04-21T23:50:58.926Z",
    "dateUpdated": "2026-04-27T15:23:56.804Z",
    "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.

Action not permitted

JVNDB-2026-000059

CVE-2026-33277 (GCVE-0-2026-33277)

CVE-2026-33566 (GCVE-0-2026-33566)

Tags

Sightings

Nomenclature

Related by attack behaviour