CVE-2026-18588

CriticalCVSS 9.8

Published: 03/08/2026(UTC)Translated: 03/08/2026(UTC)NVD NIST

Summary

In Wavlink WL-NU516U1 (version 708c073-mt7628), the fgets function in nas.cgi has a stack-based buffer overflow via the CONTENT_LENGTH argument. Remote exploitation is possible.

Risk Assessment

A remote attacker can crash the device or potentially execute arbitrary code, compromising device integrity and availability.

Recommendation

Update the device firmware to the version provided by the vendor.

Original NVD description (English source)

A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.