CVE-2026-3661: Wavlink WL-NU516U1 adm.cgi ota_new_upgrade command injection

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 18.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-07 · updated 2026-06-17
Weakness: CWE-74

Description

A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Affected products

Wavlink NU516U1: m16u1_v240425

References

https://github.com/jinhao118/cve/blob/main/WAVLINK_1.md
https://vuldb.com/?ctiid.349550
https://vuldb.com/?id.349550
https://vuldb.com/?submit.758227

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