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Description

A flaw has been found in Wavlink WL-NU516U1 up to 20251208. The affected element is the function singlePortForwardDelete of the file /cgi-bin/firewall.cgi. Executing a manipulation of the argument del_flag can lead to command injection. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-02-17 | Published 2026-02-17 | Updated 2026-02-23 | 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

20251208
affected

Timeline

2026-02-17:Advisory disclosed
2026-02-17:VulDB entry created
2026-02-20:VulDB entry last update

Credits

haimianbaobao (VulDB User) reporter

References

vuldb.com/?id.346265 (VDB-346265 | Wavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injection) vdb-entry technical-description

vuldb.com/?ctiid.346265 (VDB-346265 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.751047 (Submit #751047 | Wavlink NU516U1 V251208 Command Injection) third-party-advisory

github.com/...-V251208-/blob/main/singlePortForwardDelete.md related

github.com/...-V251208-/blob/main/singlePortForwardDelete.md exploit

cve.org (CVE-2026-2615)

nvd.nist.gov (CVE-2026-2615)

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