CVE-2026-18590

MEDIUM 6.3

Wavlink WL-NU516U1 Admin Password adm.cgi set_sys_adm os command injection

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78 CWE-77
Vendor	wavlink
Product	wl-nu516u1
Published	Aug 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Wavlink / WL-NU516U1

708c073-mt7628

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/385418 vuldb.com: https://vuldb.com/vuln/385418/cti vuldb.com: https://vuldb.com/cve/CVE-2026-18590 vuldb.com: https://vuldb.com/submit/850527 vuldb.com: https://vuldb.com/submit/850560 github.com: https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.md dl.wavlink.com: https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin

Credits

🔍 oduoke (VulDB User) VulDB CNA Team