Vulnerability-Lookup

CVE-2026-64940 (GCVE-0-2026-64940)

Vulnerability from cvelistv5 – Published: 2026-08-10 07:09 – Updated: 2026-08-10 17:39

Summary

Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from the management console.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

8.8 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 17:39 UTC

CWE

CWE-625 - Permissive regular expression

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.nishishi.com/cgi/tegalog/info/notice2…
https://jvn.jp/en/jp/JVN99975039/

Impacted products

1 product

Vendor	Product	Version
Nishishi Factory	Tegalog -Fumy Otegaru Memo Logger-	Affected: 0 , ≤ 4.8.4 (semver)

Show details on NVD website

JSON

To clipboard

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EUVD-2026-85601

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-03 10:54

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-03T10:54:43.837927+00:00",
  "id": "EUVD-2026-85601"
}

FKIE_CVE-2026-64940

Vulnerability from fkie_nvd - Published: 2026-08-10 08:16 - Updated: 2026-08-28 16:09

Severity

8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Summary

References

	URL	Tags
	vultures@jpcert.or.jp	https://jvn.jp/en/jp/JVN99975039/
	vultures@jpcert.or.jp	https://www.nishishi.com/cgi/tegalog/info/notice20260629.shtml

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Tegalog -Fumy Otegaru Memo Logger-",
          "vendor": "Nishishi Factory",
          "versions": [
            {
              "lessThanOrEqual": "4.8.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "vultures@jpcert.or.jp"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from the management console."
    }
  ],
  "id": "CVE-2026-64940",
  "lastModified": "2026-08-28T16:09:10.947",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7,
        "source": "vultures@jpcert.or.jp",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
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          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
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          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
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          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "vultures@jpcert.or.jp",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-10T17:39:10.246821Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-10T08:16:48.733",
  "references": [
    {
      "source": "vultures@jpcert.or.jp",
      "url": "https://jvn.jp/en/jp/JVN99975039/"
    },
    {
      "source": "vultures@jpcert.or.jp",
      "url": "https://www.nishishi.com/cgi/tegalog/info/notice20260629.shtml"
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-625"
        }
      ],
      "source": "vultures@jpcert.or.jp",
      "type": "Secondary"
    }
  ]
}

GHSA-M4X6-WX7H-HWVH

Vulnerability from github – Published: 2026-08-10 09:31 – Updated: 2026-08-10 09:31

Details

Severity

8.6 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64940"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-625"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T08:16:48Z",
    "severity": "HIGH"
  },
  "details": "Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from the management console.",
  "id": "GHSA-m4x6-wx7h-hwvh",
  "modified": "2026-08-10T09:31:23Z",
  "published": "2026-08-10T09:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64940"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/jp/JVN99975039"
    },
    {
      "type": "WEB",
      "url": "https://www.nishishi.com/cgi/tegalog/info/notice20260629.shtml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/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",
      "type": "CVSS_V4"
    }
  ]
}

JVNDB-2026-000104

Vulnerability from jvndb - Published: 2026-07-29 05:32 - Updated:2026-07-29 05:32

Severity

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

Summary

Permissive regular expression vulnerability in Tegalog -Fumy Otegaru Memo Logger-

Details

Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains the following vulnerability:

Permissive Regular Expression (CWE-625) - CVE-2026-64940

Yuji Tounai of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN99975039/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-64940
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

Nishishi Factory

Tegalog -Fumy Otegaru Memo Logger-

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000104.html",
  "dc:date": "2026-07-29T14:32+09:00",
  "dcterms:issued": "2026-07-29T14:32+09:00",
  "dcterms:modified": "2026-07-29T14:32+09:00",
  "description": "Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains the following vulnerability:\u003ca href=\u0027https://cwe.mitre.org/data/definitions/625.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003ePermissive Regular Expression (CWE-625) - CVE-2026-64940\u003c/li\u003e\u003c/ul\u003eYuji Tounai of Mitsui Bussan Secure Directions, Inc. 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-2026-000104.html",
  "sec:cpe": {
    "#text": "cpe:/a:nishishi:fumy_otegaru_memo_logger",
    "@product": "Tegalog -Fumy Otegaru Memo Logger-",
    "@vendor": "Nishishi Factory",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "8.6",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000104",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN99975039/index.html",
      "@id": "JVN#99975039",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-64940",
      "@id": "CVE-2026-64940",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Permissive regular expression vulnerability in Tegalog -Fumy Otegaru Memo Logger-"
}

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

CVE-2026-64940 (GCVE-0-2026-64940)

EUVD-2026-85601

FKIE_CVE-2026-64940

GHSA-M4X6-WX7H-HWVH

JVNDB-2026-000104

Tags

Sightings

Nomenclature

Related by attack behaviour