CVE-2026-2615: Wavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injection

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-17 · updated 2026-06-17
Weakness: CWE-74

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.

Affected products

Wavlink NU516U1: through 2025-12-08

References

https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/singlePortForwardDelete.md
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/singlePortForwardDelete.md#exp
https://vuldb.com/?ctiid.346265
https://vuldb.com/?id.346265
https://vuldb.com/?submit.751047

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