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[Japanese]
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JVNDB-2026-000147
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Multiple Rakuten Mobile smartphones shipped with a known private test key for Android Verified Boot
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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.
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CVSS V3 Severity:
Base Metrics 6.6 (Medium) [IPA Score]
- Attack Vector: physics
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
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CVSS v4 Severity
Base Metrics: 7.0 (High) [IPA Score]
- Access Vector (AV): Physical
- Attack Complexity (AC): Low
- Attack Requirements (AT): None
- Privileges Required (PR): Low
- User Interaction (UI): None
Vulnerable System Impact
- Confidentiality Impact (VC): High
- Integrity Impact (VI): High
- Availability Impact (VA): High
Subsequent System Impact
- Confidentiality Impact (SC): None
- Integrity Impact (SI): None
- Availability Impact (SA): None
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Rakuten Mobile, Inc.
- Rakuten BIGs all versions
- Rakuten Hand all versions
- Rakuten Hand 5G all versions
- Rakuten Mini all versions
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With physical access to the affected device, a crafted system image may be installed.
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[Stop using the products]
Affected products are no longer supported. Stop using the vulnerable products and consider switching to alternatives.
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Rakuten Mobile, Inc.
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- No Mapping(CWE-Other) [IPA Evaluation]
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- CVE-2026-107153
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- JVN : JVN#47427200
- Related document : AVBTestKeyInTheWild: Bypassing Android Verified Boot Using A Firmware Supply Chain Vulnerability on Locked Devices
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- [2026/10/14]
Web page was published
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