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[Japanese]
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JVNDB-2026-000153
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Multiple Lenovo Tablets shipped with a known private test key for Android Verified Boot
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Multiple Tablets provided by Lenovo are shipped with a known private test key for Android Verified Boot.- Use of Weak Credentials (CWE-1391) - CVE-2026-92777
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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Lenovo
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Multiple products are affected by this vulnerability. For details, see the "Vendor Status" section.
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With physical access to the affected device, a crafted system image may be installed.
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[Update the Firmware]
Update the firmware to the latest version according to the information provided by the developer.
[Stop using the products]
Since no fixes are provided for products whose support has already ended, stop using the vulnerable products and consider switching to alternatives.
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Lenovo
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- No Mapping(CWE-Other) [IPA Evaluation]
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- CVE-2026-92777
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- JVN : JVN#33436631
- Related document : Android-Device-Security.Org AVBTestKeyInTheWild: Bypassing Android Verified Boot Using A Firmware Supply Chain Vulnerability on Locked Devices
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- [2026/10/20]
Web page was published
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