What is CVE-2026-18590?

CVE-2026-18590 is a medium-severity vulnerability in Wavlink Wl-Nu516u1, classified under Command Injection. CVSS score: 6.3/10. Published 2026-08-03.

How severe is CVE-2026-18590?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Wavlink Wl-Nu516u1

CVE-2026-18590

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Wavlink Wl-nu516u1 — versions 708c073-mt7628

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (broken-link)
cna@vuldb.com (patch, broken-link)

Frequently asked questions

What is CVE-2026-18590?: CVE-2026-18590 is a medium-severity vulnerability in Wavlink Wl-Nu516u1, classified under Command Injection. CVSS score: 6.3/10. Published 2026-08-03.
How severe is CVE-2026-18590?: Medium severity. CVSS v3 base score is 6.3 out of 10.