---
id: CVE-2026-89052
title: Hardcoded AES encryption key in Archer C6
summary: >-
  A hardcoded cryptographic key management vulnerability exists in Archer C6 due
  to the use of a universal cryptographic key shared across devices. An attacker
  who obtains an encrypted configuration file or other protected credential data
  …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-321
vendor: TP-Link Systems Inc.
product: Archer C6 V2
affected:
  - archer_c6_v2 < 1.2.1 Build 260902
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T22:40:16.165Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89052'
references:
  - url: 'https://www.tp-link.com/us/support/download/archer-c6/v2/#Firmware'
  - url: 'https://www.tp-link.com/us/support/faq/5356/'
tags:
  - cve.org
ingestedAt: '2026-10-21T23:20:10.331Z'
---

## Overview

A hardcoded cryptographic key management vulnerability exists in Archer C6 due to the use of a universal cryptographic key shared across devices. An attacker who obtains an encrypted configuration file or other protected credential data can recover plaintext credentials. 

Successful exploitation may allow unauthorized disclosure of sensitive information, including administrative credentials.

## Affected

- `archer_c6_v2 < 1.2.1 Build 260902`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.