Vulnerability-Lookup

JVNDB-2026-000147

Vulnerability from jvndb - Published: 2026-10-14 08:37 - Updated:2026-10-14 08:37

Severity

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

Summary

Multiple Rakuten Mobile smartphones shipped with a known private test key for Android Verified Boot

Details

Multiple smartphones provided by Rakuten Mobile, Inc. utilize AOSP test keys for their Android Verified Boot (AVB) functionality.

Use of Weak Credentials (CWE-1391) - CVE-2026-107153

Masayoshi Matsubara 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/JVN47427200/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-107153
	Related document	https://www.android-device-security.org/publications/
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	Rakuten Mobile, Inc.	Rakuten BIGs
	Rakuten Mobile, Inc.	Rakuten Hand
	Rakuten Mobile, Inc.	Rakuten Hand 5G
	Rakuten Mobile, Inc.	Rakuten Mini

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000147.html",
  "dc:date": "2026-10-14T17:37+09:00",
  "dcterms:issued": "2026-10-14T17:37+09:00",
  "dcterms:modified": "2026-10-14T17:37+09:00",
  "description": "Multiple smartphones provided by Rakuten Mobile, Inc. utilize AOSP test keys for their Android Verified Boot (AVB) functionality.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/1391.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eUse of Weak Credentials (CWE-1391) - CVE-2026-107153\u003c/li\u003e\u003c/ul\u003eMasayoshi Matsubara 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-2026-000147.html",
  "sec:cpe": [
    {
      "#text": "cpe:/h:rakuten:rakuten_bigs",
      "@product": "Rakuten BIGs",
      "@vendor": "Rakuten Mobile, Inc.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/h:rakuten:rakuten_hand",
      "@product": "Rakuten Hand",
      "@vendor": "Rakuten Mobile, Inc.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/h:rakuten:rakuten_hand_5g",
      "@product": "Rakuten Hand 5G",
      "@vendor": "Rakuten Mobile, Inc.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/h:rakuten:rakuten_mini",
      "@product": "Rakuten Mini",
      "@vendor": "Rakuten Mobile, Inc.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": {
    "@score": "6.6",
    "@severity": "Medium",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000147",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN47427200/index.html",
      "@id": "JVN#47427200",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-107153",
      "@id": "CVE-2026-107153",
      "@source": "CVE"
    },
    {
      "#text": "https://www.android-device-security.org/publications/",
      "@id": "AVBTestKeyInTheWild: Bypassing Android Verified Boot Using A Firmware Supply Chain Vulnerability on Locked Devices",
      "@source": "Related document"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Multiple Rakuten Mobile smartphones shipped with a known private test key for Android Verified Boot"
}

CVE-2026-107153 (GCVE-0-2026-107153)

Vulnerability from cvelistv5 – Published: 2026-10-14 05:12 – Updated: 2026-10-14 16:04 Unsupported When Assigned

Summary

Multiple smartphones provided by Rakuten Mobile, Inc. utilize AOSP test keys for their Android Verified Boot (AVB) functionality. With physical access to the affected device, a crafted system image may be installed.

Severity

6.6 (Medium)


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

7 (High)


                        
                          CVSS:4.0/AV:P/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 2026-10-14 16:04 UTC

CWE

CWE-1391 - Use of weak credentials

Assigner

jpcert CNA under the jpcert root

CNA scorecard C 64/100 over 186 records in the last 180 days details

References

5 references

URL	Tags
https://network.mobile.rakuten.co.jp/product/smar…
https://network.mobile.rakuten.co.jp/product/smar…
https://network.mobile.rakuten.co.jp/product/smar…
https://network.mobile.rakuten.co.jp/product/smar…
https://jvn.jp/en/jp/JVN47427200/

Impacted products

4 products

Vendor	Product	Version
Rakuten Mobile, Inc.	Rakuten Mini	Affected: all versions
Rakuten Mobile, Inc.	Rakuten Hand	Affected: all versions
Rakuten Mobile, Inc.	Rakuten Hand 5G	Affected: all versions
Rakuten Mobile, Inc.	Rakuten BIGs	Affected: all versions

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107153",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-14T16:04:35.274479Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-14T16:04:59.139Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Rakuten Mini",
          "vendor": "Rakuten Mobile, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "all versions"
            }
          ]
        },
        {
          "product": "Rakuten Hand",
          "vendor": "Rakuten Mobile, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "all versions"
            }
          ]
        },
        {
          "product": "Rakuten Hand 5G",
          "vendor": "Rakuten Mobile, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "all versions"
            }
          ]
        },
        {
          "product": "Rakuten BIGs",
          "vendor": "Rakuten Mobile, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "all versions"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Multiple smartphones provided by Rakuten Mobile, Inc. utilize AOSP test keys for their Android Verified Boot (AVB) functionality. With physical access to the affected device, a crafted system image may be installed."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:P/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"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:P/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": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-1391",
              "description": "Use of weak credentials",
              "lang": "en-US",
              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-14T05:12:36.187Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://network.mobile.rakuten.co.jp/product/smartphone/rakuten-mini/support/index.html"
        },
        {
          "url": "https://network.mobile.rakuten.co.jp/product/smartphone/rakuten-hand/support/index.html"
        },
        {
          "url": "https://network.mobile.rakuten.co.jp/product/smartphone/rakuten-hand-5g/support/index.html"
        },
        {
          "url": "https://network.mobile.rakuten.co.jp/product/smartphone/rakuten-big-s/support/index.html"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN47427200/"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-107153",
    "datePublished": "2026-10-14T05:12:36.187Z",
    "dateReserved": "2026-10-07T10:23:41.353Z",
    "dateUpdated": "2026-10-14T16:04:59.139Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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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