CVE-2026-18589
CriticalCVSS 9.8Summary
In Wavlink WL-NU516U1 (version 708c073-mt7628), the change_password function in nas.cgi has a stack-based buffer overflow via the User1Passwd argument. The attack can be executed remotely, and the exploit is publicly available.
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 was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.