CVE-2026-5363 MEDIUM

CVE-2026-5363: Use of weak cryptographic key in TP-Link Archer C7

Vendor Tp-Link Systems Inc.
Product Archer C7 v5 and v5.8
Weakness CWE-326 · Weak encryption
Published April 15, 2026
Last update April 16, 2026

CVSS base score

5.4/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 15, 2026 CVE published
April 16, 2026 Record updated