CVE-2022-40621: Wavlink WN531G3 Firmware

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Because the WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 and earlier communicates over HTTP and not HTTPS, and because the hashing mechanism does not rely on a server-supplied key, it is possible for an attacker with sufficient network access to capture the hashed password of a logged on user and use it in a classic Pass-the-Hash style attack.

Affected products

• Wavlink WN531G3 Firmware: up to and including m31g3.v5030.200325

Published 2022-09-13. Last modified 2026-06-17.