Security Advisory: Information disclosure vulnerability in the cloud-client daemon of Deco BE63 (CVE-2026-100420)

Vulnerability and Impact Description:

CVE-2026-100420: Information disclosure vulnerability in the cloud-client daemon of Deco BE63

A sensitive information disclosure vulnerability in the cloud-client daemon of Deco BE63 V2.0 allows authenticated attackers to retrieve the plaintext TP-Link ID account password.

Successful exploitation may allow attackers to compromise the associated cloud account and perform unauthorized actions on behalf of the affected user.

CVSS v4.0 Score: 6.8 / Medium

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected Products/Versions and Fixes:

Recommendations:

We strongly recommend that users with affected devices take the following actions:

1. Update affected devices to the latest firmware version that fixed the vulnerability:

US: Download for Deco BE63 | TP-Link

Disclaimer:

This advisory is provided for informational purposes only and is subject to change without notice. The information is provided “as is” without warranties of any kind. TP-Link recommends that customers promptly apply available firmware updates or implement documented workarounds as provided in this advisory. Devices/systems that are not updated or mitigated as described may remain vulnerable, and TP-Link disclaims any responsibility or liability for any damages or losses arising from a failure to implement such updates.