---
id: "CVE-2026-100420"
kind: "vulnerability"
aliases: ["CVE-2026-100420"]
title: "TP-Link Deco BE63: cloud daemon leaks plaintext TP-Link ID password to logged-in users"
severity: "medium"
cvss: 6.8
epss: 0.00155
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cloud-account", "deco-be63", "infrastructure", "mesh-router", "tp-link"]
not_affected_if: ["local-admin-only-access", "no-tp-link-id-linked"]
published_at: "2026-10-21T23:17:23+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T03:42:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100420", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-100420", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# TP-Link Deco BE63: cloud daemon leaks plaintext TP-Link ID password to logged-in users

The cloud-client daemon on the TP-Link Deco BE63 mesh router can be made to return the plaintext password of the TP-Link ID cloud account. An attacker who already has an authenticated session on the device can read that password and use it to take over the linked cloud account.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Confirm the device model and firmware version in the Deco app or admin page; BE63 is the affected model
- unknown for the exact vulnerable firmware range, the sources do not list it

## Fix

- Update the Deco BE63 to the latest firmware from TP-Link; the sources do not name a fixed version
- Change the TP-Link ID password and enable two-factor authentication on the account if the device has been shared or exposed
- Review the TP-Link ID account for unknown logins or devices

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-100420
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-100420

## From the sources

A sensitive information disclosure vulnerability in the cloud-client daemon of Deco BE63 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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_