Description
A security flaw has been discovered in Wavlink NU516U1 M16U1_V240425. Affected is the function sub_4016F0 of the file /cgi-bin/firewall.cgi. The manipulation of the argument del_flag results in command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.
References (5)
Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.325831
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.325831
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.652784
Exploit, Third Party Advisory related
https://github.com/panda666-888/vuls/blob/main/wavlink/nu516u1/singlePortForwardDelete.md
Exploit, Third Party Advisory exploit
https://github.com/panda666-888/vuls/blob/main/wavlink/nu516u1/singlePortForwardDelete.md#poc
Scores
CVSS v3
6.3
EPSS
0.0022
EPSS Percentile
44.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-74
CWE-77
Status
published
Products (1)
wavlink/wl-nu516u1_firmware
m16u1_v240425
Published
Sep 25, 2025
Tracked Since
Feb 18, 2026