CVE-2026-5363CWE-326

Use of weak cryptographic key in TP-Link Archer C7

Medium · published April 15, 2026

CVSS v4.0
5.4
EPSS
0%
Percentile
1.5
In the wild
Unconfirmed
What it 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.

The record
Technical detail
CVSS v4.0
5.4 · MEDIUM
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
EPSS
0.00115 · 1.5th percentile
Weakness
CWE-326 · Inadequate Encryption Strength
Published
2026-04-15T23:45Z
EPSS history
Timeline
  • 15 APR 23:45Z
    Use of weak cryptographic key in TP-Link Archer C7
    cvelistv5