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7.3
Wavlink WL-NU516U1: Firmware URL Manipulation Can Cause Crash
CVE-2026-2566
Summary
A security flaw in the Wavlink WL-NU516U1 device's management interface allows an attacker to remotely crash the device by manipulating a specific setting. This can happen if the device is not properly updated with the latest firmware. If you use this device, update it immediately to the latest version to prevent a potential crash.
Original title
A security vulnerability has been detected in Wavlink WL-NU516U1 up to 130/260. This affects the function sub_406194 of the file /cgi-bin/adm.cgi. Such manipulation of the argument firmware_url lea...
Original description
A security vulnerability has been detected in Wavlink WL-NU516U1 up to 130/260. This affects the function sub_406194 of the file /cgi-bin/adm.cgi. Such manipulation of the argument firmware_url leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
nvd CVSS2.0
8.3
nvd CVSS3.1
7.2
nvd CVSS4.0
7.3
Vulnerability type
CWE-119
Buffer Overflow
CWE-121
Stack-based Buffer Overflow
Published: 16 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026