CVE-2025-26410: Weak Hard-coded Credentials

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-11 · updated 2026-06-17
Weakness: CWE-798

Description

The firmware of all Wattsense Bridge devices contain the same hard-coded user and root credentials. The user password can be easily recovered via password cracking attempts. The recovered credentials can be used to log into the device via the login shell that is exposed by the serial interface. The backdoor user has been removed in firmware BSP >= 6.4.1.

Affected products

Wattsense Bridge: before 6.4.1 — fixed in 6.4.1

How to fix

Upgrade to a fixed version: Wattsense Bridge 6.4.1. Check the vendor advisory for mitigations.

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

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