What’s Vulnerable › Vulnerabilities

CVE-2026-89052: Hardcoded AES encryption key in Archer C6

• Severity: medium (CVSS 5.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-21 · updated 2026-10-30
• Weakness: CWE-321

Description

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 products

• TP-Link Systems Inc. Archer C6 V2: before 1.2.1 Build 260902 — fixed in 1.2.1 Build 260902

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Archer C6 V2 1.2.1 Build 260902. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/us/support/download/archer-c6/v2/#Firmware
• https://www.tp-link.com/us/support/faq/5356/

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