CVE-2025-26409

Access to Bootloader and Shell Over Serial Interface

Published Feb 11, 2025 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
A serial interface can be accessed with physical access to the PCB of Wattsense Bridge devices. After connecting to the interface, access to the bootloader is possible, as well as a Linux login prompt. The bootloader access can be used to gain a root shell on the device. This issue is fixed in recent firmware versions BSP >= 6.4.1.

Remediation

Vendor Solution

This issue is fixed in recent firmware versions BSP >= 6.4.1.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-4192 A serial interface can be accessed with physical access to the PCB of Wattsense Bridge devices. After connecting to the interface, access to the bootloader is possible, as well as a Linux login prompt. The bootloader access can be used to gain a root shell on the device. This issue is fixed in recent firmware versions BSP >= 6.4.1.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00028}

epss

{'score': 0.00031}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A serial interface can be accessed with physical access to the PCB of Wattsense Bridge devices. After connecting to the interface, access to the bootloader is possible, as well as a Linux login prompt. The bootloader access can be used to gain a root shell on the device. This issue is fixed in recent firmware versions BSP >= 6.4.1.
Title Access to Bootloader and Shell Over Serial Interface
Weaknesses CWE-1191
CWE-1299
References

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
SEC-VLab
Published
Updated
Nov 3, 2025, 9:12 PM
Reserved
Feb 10, 2025, 7:48 AM
Status
Deferred
Published
Feb 11, 2025, 10:15 AM
Modified
Jun 17, 2026, 9:01 AM