CVE-2026-18590: medium-severity vulnerability in Wavlink WL-NU516U1
Wavlink WL-NU516U1 Admin Password adm.cgi set_sys_adm os command injection
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 1.8%
A vulnerability was determined in Wavlink WL-NU516U1 708c073-mt7628. Affected is the function set_sys_adm of the file adm.cgi of the component Admin Password Handler. This manipulation causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
Wavlink · WL-NU516U1Related CVEs — Wavlink WL-NU516U1
In the same product, most dangerous first.
CVE-2026-3662MEDIUMWavlink WL-NU516U1 adm.cgi usb_p910 command injectionEPSS 20.3%CVE-2026-3661MEDIUMWavlink WL-NU516U1 adm.cgi ota_new_upgrade command injectionEPSS 19.7%CVE-2025-10775MEDIUMWavlink WL-NU516U1 login.cgi sub_4012A0 os command injectionEPSS 16.7%CVE-2026-3612HIGHWavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injectionEPSS 14.3%CVE-2026-2615HIGHWavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injectionEPSS 13.4%CVE-2025-9149MEDIUMWavlink WL-NU516U1 wireless.cgi sub_4032E4 command injectionEPSS 5.1%
References
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.binhttps://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.mdhttps://vuldb.com/cve/CVE-2026-18590https://vuldb.com/submit/850527https://vuldb.com/submit/850560https://vuldb.com/vuln/385418https://vuldb.com/vuln/385418/cti