CVE-2026-8191 Wavlink NU516U1 adm.cgi wifi_region os command injection
Remote attackers can execute arbitrary OS commands via the wifi_region parameter in adm.cgi on Wavlink NU516U1 routers.
- 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-2026-8191?
CVE-2026-8191 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 identified in Wavlink NU516U1 M16U1_V240425. This affects the function wifi_region of the file /cgi-bin/adm.cgi. Such manipulation of the argument skiplist1/skiplist2 leads to os command injection. The attack can be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.
Which versions are affected by CVE-2026-8191?
It affects 1 product.
Products include Wavlink Wl-Nu516u1 Firmware.
How do I fix CVE-2026-8191?
No fix has been published for CVE-2026-8191 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-2026-8191 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8191 exists.
Other vulnerabilities in Wavlink NU516U1
- CVE-2026-3703 Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write
- CVE-2026-4861 Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow
- CVE-2026-3612 Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection
- CVE-2026-3613 Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow
- CVE-2026-2615 Wavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injection
Sources
Also known as GHSA-h4pj-rg5x-h3wx.