Root filesystem compromise via passwordless U-Boot console
Published Sep 3, 2026 · Updated Sep 3, 2026
Improper physical access control in Shizen Box 2 dev-conf 1.0.10 and earlier allows physically proximate attackers to read or alter rootfs files. U-Boot has no login password, so serial input during its limited startup window enters the console and exposes administrative commands. Physical access to the serial port is required; exploitation permits confidential-file reads, backdoors, unauthorized configuration changes, and persistent access.
Summary
What happened
Improper physical access control in Shizen Box 2 dev-conf 1.0.10 and earlier allows physically proximate attackers to read or alter rootfs files. U-Boot has no login password, so serial input during its limited startup window enters the console and exposes administrative commands. Physical access to the serial port is required; exploitation permits confidential-file reads, backdoors, unauthorized configuration changes, and persistent access.
The record
- CVE
- CVE-2026-80253
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Vendor
- Shizen Connect
- Product
- Shizen Box 2 dev-conf
- Classifications
- CWE-1263, CAPEC-401, T1565.001
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=v1.0.10
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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