CVE-2026-3612

Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection

A vulnerability was determined in Wavlink WL-NU516U1 V240425. This affects the function sub_405AF4 of the file /cgi-bin/adm.cgi of the component OTA Online Upgrade. This manipulation of the argument firmware_url causes command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

Affected

Wavlink · WL-NU516U1

CVSS v4.0 VULDB

7.3 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 VULDB

8.3 HIGHAV:N/AC:L/Au:M/C:C/I:C/A:C

EPSS

10.39% chance of exploitation in the next 30 days, 96th percentile

Published

2026-03-06

Updated

2026-03-09

Proof-of-concept exploits (1)

• Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md

Security advisories

• https://vuldb.com/?id.349220
• https://vuldb.com/?submit.754668

References

• CVE Record
• NVD entry

Related

• CVE-2026-101187
• CVE-2026-2565
• CVE-2026-2566
• CVE-2026-2567
• CVE-2026-2615
• CVE-2026-3613