Cryptographic Key Management Vulnerability in Archer C6 by TP-Link
CVE-2026-89052

5.9MEDIUM

Key Information:

Vendor

Tp-link Systems Inc.

Status
Archer C6 V2
Vendor
CVE Published:
21 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-89052?

A hardcoded cryptographic key management flaw exists in TP-Link's Archer C6 routers, stemming from the implementation of a universal cryptographic key shared across multiple devices. This weakness allows potential attackers to exploit encrypted configuration files or sensitive credential data, leading to the recovery of plaintext credentials. The resulting unauthorized access can compromise sensitive information, including critical administrative credentials, thereby posing significant security risks to users.

Affected Version(s)

Archer C6 V2 0 < 1.2.1 Build 260902

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-89052-archer-c6-aes
Created by sergioamsilva

References

https://www.tp-link.com/us/support/download/archer-c6/v2/...
patch
https://www.tp-link.com/us/support/faq/5356/
vendor-advisory

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sérgio Silva CYBERS3C
.