TP-Link Archer C6 Cryptographic Key Management hard-coded credentials

Summaryinfo

A vulnerability was found in TP-Link Archer C6. It has been declared as critical. This vulnerability affects unknown code of the component Cryptographic Key Management. Executing a manipulation can lead to hard-coded credentials. This vulnerability is tracked as CVE-2026-89052. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in TP-Link Archer C6 (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component Cryptographic Key Management. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. The CWE definition for the vulnerability is CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at tp-link.com. This vulnerability was named CVE-2026-89052 since 09/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/22/2026). The MITRE ATT&CK project declares the attack technique as T1110.001.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• TP-Link

Name

• Archer C6

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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