CVE-2026-89052: CWE-321 Use of hard-coded cryptographic key in TP-Link Systems Inc. Archer C6 V2
Description
CVE-2026-89052 is a vulnerability in the TP-Link Archer C6 V2 router involving the use of a hardcoded cryptographic key shared universally across devices. This flaw allows an attacker who obtains an encrypted configuration file or protected credential data to recover plaintext credentials, potentially exposing sensitive administrative information. The vulnerability has a medium severity rating with a CVSS 4.0 score of 5.9. No patch or remediation information is currently provided by the vendor.
CVSS v4.0
Score 5.9medium
Affected software
TP-Link Systems Inc.
Archer C6 V2
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-89052) in TP-Link Systems Inc.'s Archer C6 V2 router arises from the use of a hardcoded cryptographic key (CWE-321) that is the same across all affected devices. An attacker with access to encrypted configuration files or other protected credential data can decrypt these using the universal key, thereby recovering plaintext credentials including administrative credentials. The CVSS 4.0 vector indicates network attack vector, low attack complexity, partial privileges required, no user interaction, and high impact on confidentiality.
Potential Impact
Successful exploitation can lead to unauthorized disclosure of sensitive information such as administrative credentials, which could compromise device management and security. The vulnerability does not indicate direct code execution or denial of service but poses a significant confidentiality risk.
Mitigation Recommendations
No vendor advisory or patch information is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to configuration files and sensitive credential data to trusted parties only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-09-10T17:16:02.019Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad944344d27ba8daa0bcbc3
Added to database: 10/21/2026, 23:01:08 UTC
Last enriched: 10/21/2026, 23:15:37 UTC
Last updated: 10/21/2026, 23:15:37 UTC
Views: 3
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