TP-Link Archer C7 5/5.8 Web Interface inadequate encryption

Summaryinfo

A vulnerability identified as problematic has been detected in TP-Link Archer C7 5/5.8. Impacted is an unknown function of the component Web Interface. This manipulation causes inadequate encryption. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is registered as CVE-2026-5363. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in TP-Link Archer C7 5/5.8 and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Web Interface. The manipulation with an unknown input leads to a inadequate encryption vulnerability. The CWE definition for the vulnerability is CWE-326. The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. As an impact it is known to affect confidentiality. The summary by CVE is:

Inadequate Encryption Strength vulnerability in TP-Link Archer C7 v5 and v5.8 (uhttpd modules) allows Password Recovery Exploitation. The web interface encrypts the admin password client-side using RSA-1024 before sending it to the router during login.  An adjacent attacker with the ability to intercept network traffic could potentially perform a brute-force or factorization attack against the 1024-bit RSA key to recover the plaintext administrator password, leading to unauthorized access and compromise of the device configuration.  This issue affects Archer C7: through Build 20220715.

It is possible to read the advisory at tp-link.com. This vulnerability is known as CVE-2026-5363 since 04/01/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

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 C7

Version

• 5
• 5.8

License

• commercial

Support

• end of life

Website

• Vendor: https://www.tp-link.com/

CPE 2.3info

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CPE 2.2info

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