CVE-2026-2566

HIGH 7.2

Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	wavlink
Product	wl-nu516u1
Published	Feb 16, 2026
Last Updated	Feb 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Wavlink / WL-NU516U1

130 260

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.346173 vuldb.com: https://vuldb.com/?ctiid.346173 vuldb.com: https://vuldb.com/?submit.751908 github.com: https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.md

Credits

🔍 haimianbaobao (VulDB User)