CVE-2026-8190 Wavlink NU516U1 adm.cgi wan os command injection

Medium 5.3 Published 9 May 2026 Updated 11 May 2026

Remote attackers can execute arbitrary OS commands on Wavlink NU516U1 routers via the adm.cgi interface, requiring specific permissions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-8190?

CVE-2026-8190 is a medium-severity command injection vulnerability in Wavlink NU516U1, published on 9 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was determined in Wavlink NU516U1 M16U1_V240425. Affected by this issue is the function wan of the file /cgi-bin/adm.cgi. This manipulation of the argument ppp_username/ppp_passwd/rwan_ip/rwan_mask/rwan_gateway is directly passed by the attacker/so we can control the ppp_username/ppp_passwd/rwan_ip/rwan_mask/rwan_gateway causes os command injection. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-8190?

It affects 1 product.

Products include Wavlink Wl-Nu516u1 Firmware.

How do I fix CVE-2026-8190?

No fix has been published for CVE-2026-8190 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-8190 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8190 exists.

Sources

Also known as GHSA-hm76-m6wf-p499.