CVE-2025-34251 - CVE House
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Status published High CVE-2025-34251

Tesla Telematics Control Unit (TCU) < v2025.14 Authentication Bypass

Vulnerability Description

Tesla Telematics Control Unit (TCU) firmware prior to v2025.14 contains an authentication bypass vulnerability. The TCU runs the Android Debug Bridge (adbd) as root and, despite a “lockdown” check that disables adb shell, still permits adb push/pull and adb forward. Because adbd is privileged and the device’s USB port is exposed externally, an attacker with physical access can write an arbitrary file to a writable location and then overwrite the kernel’s uevent_helper or /proc/sys/kernel/hotplug entries via ADB, causing the script to be executed with root privileges.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Alex Plaskett and McCaulay Hudson of NCC Group

References

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Affected Vendor

Affected Software

Telematics Control Unit (TCU)
Vulnerable Versions:
0

Timeline

Official Publish: October 6th, 2025
Last Modified: May 15th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-269 CWE-288

MITRE ATT&CK TTPs

T1078 Valid Accounts
Persistence
T1098 Account Manipulation
Privilege Escalation
T1548 Abuse Elevation Control Mechanism
Privilege Escalation
T1222 File and Directory Permissions Modification
Defense Evasion
T1134 Access Token Manipulation
Defense Evasion
T1190 Exploit Public-Facing Application
Initial Access
T1550 Use Alternate Authentication Material
Defense Evasion
T1021 Remote Services
Lateral Movement