Vulnerability details

CVE-2026-3612

Wavlink WL-NU516U1

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

CVSS 4.0

8.6High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.6High	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS: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`
7.2High	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
7.2High	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
8.3High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR`

Affected products

Vendor	Product	Versions	Source
Wavlink	WL-NU516U1	V240425	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/?id.349220 vdb-entrytechnical-description
https://vuldb.com/?ctiid.349220 signaturepermissions-required
https://vuldb.com/?submit.754668 third-party-advisory
https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md exploit

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Details

Published: 2026-03-06
Last updated: 2026-03-09
State: Published
Assigner (CNA): VulDB

Exploit prediction (EPSS)

14.33%

Probability of exploitation in 30 days

96.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-77
Command Injection
CWE-74
Injection