Vulnerability-Lookup

JVNDB-2026-035794

Vulnerability from jvndb - Published: 2026-09-29 04:35 - Updated:2026-09-29 04:35

Severity

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

Summary

Multiple vulnerabilities in BUFFALO Wi-Fi Products

Details

The web configuration user interfaces of Wi-Fi products provided by BUFFALO INC. contain multiple vulnerabilities listed below.

OS command injection (CWE-78) - CVE-2026-86530
Stack-based buffer overflow (CWE-121) - CVE-2026-95104

Veeti Punnonen reported these vulnerabilities to JPCERT/CC. JPCERT/CC coordinated with the developer.

References

Type

URL

	JVN	https://jvn.jp/en/vu/JVNVU94863997/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-86530
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-95104
	Stack-based Buffer Overflow(CWE-121)	https://cwe.mitre.org/data/definitions/121.html
	OS Command Injection(CWE-78)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	BUFFALO INC.	WSR-300HP
	BUFFALO INC.	WEX-G300

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-035794.html",
  "dc:date": "2026-09-29T13:35+09:00",
  "dcterms:issued": "2026-09-29T13:35+09:00",
  "dcterms:modified": "2026-09-29T13:35+09:00",
  "description": "The web configuration user interfaces of Wi-Fi products provided by BUFFALO INC. contain 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/121.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eOS command injection (CWE-78) - CVE-2026-86530\u003c/li\u003e\u003cli\u003eStack-based buffer overflow (CWE-121) - CVE-2026-95104\u003c/li\u003e\u003c/ul\u003eVeeti Punnonen reported these vulnerabilities to JPCERT/CC.\r\nJPCERT/CC coordinated with the developer.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-035794.html",
  "sec:cpe": [
    {
      "#text": "cpe:/h:buffalo_inc:wsr-300hp",
      "@product": "WSR-300HP",
      "@vendor": "BUFFALO INC.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:buffalo_inc:wex-g300",
      "@product": "WEX-G300",
      "@vendor": "BUFFALO INC.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": {
    "@score": "7.2",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-035794",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/vu/JVNVU94863997/index.html",
      "@id": "JVNVU#94863997",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-86530",
      "@id": "CVE-2026-86530",
      "@source": "CVE"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-95104",
      "@id": "CVE-2026-95104",
      "@source": "CVE"
    },
    {
      "#text": "https://cwe.mitre.org/data/definitions/121.html",
      "@id": "CWE-121",
      "@title": "Stack-based Buffer Overflow(CWE-121)"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-78",
      "@title": "OS Command Injection(CWE-78)"
    }
  ],
  "title": "Multiple vulnerabilities in BUFFALO Wi-Fi Products"
}

CVE-2026-86530 (GCVE-0-2026-86530)

Vulnerability from cvelistv5 – Published: 2026-09-28 08:14 – Updated: 2026-09-28 08:14

Summary

BUFFALO Wi-Fi products handle some web form input improperly to assemble command line strings internally. An administrative user may send a crafted HTTP request and execute an arbitrary OS command.

Severity

7.2 (High)


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

8.6 (High)


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

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.buffalo.jp/news/detail/20260928-01.html
https://jvn.jp/en/vu/JVNVU94863997/

Impacted products

2 products

Vendor	Product	Version
BUFFALO INC.	WSR-300HP	Affected: 0 , < Ver.2.55 (semver)
BUFFALO INC.	WEX-G300	Affected: 0 , < Ver.1.71 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "WSR-300HP",
          "vendor": "BUFFALO INC.",
          "versions": [
            {
              "lessThan": "Ver.2.55",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "WEX-G300",
          "vendor": "BUFFALO INC.",
          "versions": [
            {
              "lessThan": "Ver.1.71",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "BUFFALO Wi-Fi products handle some web form input improperly to assemble command line strings internally. An administrative user may send a crafted HTTP request and execute an arbitrary OS command."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "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": "2026-09-28T08:14:00.049Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.buffalo.jp/news/detail/20260928-01.html"
        },
        {
          "url": "https://jvn.jp/en/vu/JVNVU94863997/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-86530",
    "datePublished": "2026-09-28T08:14:00.049Z",
    "dateReserved": "2026-09-24T08:54:17.872Z",
    "dateUpdated": "2026-09-28T08:14:00.049Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-95104 (GCVE-0-2026-95104)

Vulnerability from cvelistv5 – Published: 2026-09-28 08:14 – Updated: 2026-09-28 08:14

Summary

Stack-based buffer overflow vulnerability exists in BUFFALO Wi-Fi products. A non-authenticated crafted HTTP request may cause a denial-of-service (DoS) condition.

Severity

7.5 (High)


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

8.7 (High)


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

CWE

CWE-121 - Stack-based buffer overflow

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.buffalo.jp/news/detail/20260928-01.html
https://jvn.jp/en/vu/JVNVU94863997/

Impacted products

2 products

Vendor	Product	Version
BUFFALO INC.	WSR-300HP	Affected: 0 , < Ver.2.55 (semver)
BUFFALO INC.	WEX-G300	Affected: 0 , < Ver.1.71 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "WSR-300HP",
          "vendor": "BUFFALO INC.",
          "versions": [
            {
              "lessThan": "Ver.2.55",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "WEX-G300",
          "vendor": "BUFFALO INC.",
          "versions": [
            {
              "lessThan": "Ver.1.71",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Stack-based buffer overflow vulnerability exists in BUFFALO Wi-Fi products. A non-authenticated crafted HTTP request may cause a denial-of-service (DoS) condition."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack-based buffer overflow",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T08:14:36.848Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.buffalo.jp/news/detail/20260928-01.html"
        },
        {
          "url": "https://jvn.jp/en/vu/JVNVU94863997/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-95104",
    "datePublished": "2026-09-28T08:14:36.848Z",
    "dateReserved": "2026-09-24T08:54:17.057Z",
    "dateUpdated": "2026-09-28T08:14:36.848Z",
    "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.

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.

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JVNDB-2026-035794

CVE-2026-86530 (GCVE-0-2026-86530)

CVE-2026-95104 (GCVE-0-2026-95104)

Tags

Sightings

Nomenclature

Related by attack behaviour