CVE-2026-3612: Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-06 · updated 2026-06-17
Weakness: CWE-74

Description

A vulnerability was determined in Wavlink WL-NU516U1 V240425. This affects the function sub_405AF4 of the file /cgi-bin/adm.cgi of the component OTA Online Upgrade. This manipulation of the argument firmware_url causes command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

Affected products

Wavlink NU516U1: m16u1_v240425

References

https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md
https://vuldb.com/?ctiid.349220
https://vuldb.com/?id.349220
https://vuldb.com/?submit.754668

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