Vulnerability · Published Mar 6, 2026 · Assigned by VulDB

CVE-2026-3612Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection

High 7.2

In plain English

A high-severity command injection in WL-NU516U1 from Wavlink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 14.3% (higher than 97% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)14.3%top 3.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Wavlink	WL-NU516U1	V240425

Weakness: CWE-77, CWE-74 · Vector: 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

References

VDB-349220 | Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection vdb-entry, technical-description
VDB-349220 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #754668 | Wavlink NU516U1 V240425 Command Injection third-party-advisory
https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md exploit