CVE-2026-5363: TP-Link Archer c7 Firmware

High severity, CVSS 8.8. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• TP-Link Archer c7 Firmware: before 1.2.1 (fixed in 1.2.1)

Published 2026-04-16. Last modified 2026-06-17.