CVE-2025-26409 (CVSS 6.8)

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.

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CVSS v3.1 Score

6.8

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-1191 CWE-1191

CWE-1299 CWE-1299

References

Other References

https://r.sec-consult.com/wattsense https://support.wattsense.com/hc/en-150/articles/13366066529437-Release-Notes http://seclists.org/fulldisclosure/2025/Feb/9

Frequently Asked Questions

What is CVE-2025-26409? +

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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-26409? +

CVE-2025-26409 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-26409? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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