CVE-2026-2566
Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow
- State
- Published
- Severity
- 8.6 High
- Published
- Feb 16, 2026
- Updated
- Feb 23, 2026
- Reserved
- Feb 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.2 High | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 8.3 High | AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
WL-NU516U1Wavlink |
|
References
- VDB-346173 | Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflowvdb-entrytechnical-description
- VDB-346173 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #751908 | Wavlink NU516U1 V251208 Stack-based Buffer Overflowthird-party-advisory
- https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.mdexploit
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