CVE-2026-3612 | THREATINT

Description

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.

PUBLISHED Reserved 2026-03-05 | Published 2026-03-06 | Updated 2026-03-06 | Assigner VulDB

HIGH: 8.6CVSS: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

HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

HIGH: 7.2CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

8.3AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Command Injection

Injection

Product status

V240425

affected

Timeline

2026-03-05:	Advisory disclosed
2026-03-05:	VulDB entry created
2026-03-05:	VulDB entry last update

Credits

haimianbaobao (VulDB User) reporter

VulDB coordinator

References

vuldb.com/?id.349220 (VDB-349220 | Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection) vdb-entry technical-description

vuldb.com/?ctiid.349220 (VDB-349220 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.754668 (Submit #754668 | Wavlink NU516U1 V240425 Command Injection) third-party-advisory

github.com/...AVLINK-NU516-V240425/blob/main/firmware_url.md exploit

cve.org (CVE-2026-3612)

nvd.nist.gov (CVE-2026-3612)

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