High 7.2Published Feb 16, 2026

CVE-2026-2566Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow

Updated under an hour ago (Oct 27, 2026, 2:30 PM ET)

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It affects Wavlink WL-NU516U1. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Wavlink WL-NU516U1

Exploited in the last 30 days

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.

CVSS: 7.2 HIGH (v3.1, CNA)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
Weakness (CWE): CWE-121, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Feb 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Wavlink WL-NU516U1 wavlink:wl-nu516u1_firmware	130; 260	CNA record

References

References

https://vuldb.com/?id.346173	vdb-entry, technical-description
https://vuldb.com/?ctiid.346173	signature, permissions-required
https://vuldb.com/?submit.751908	third-party-advisory
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.md	exploit

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.