RCE in Wavlink Wl-nu516u1
CVE-2026-2615
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. Th…
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.005 (64.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). 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.
Affected products
- Wavlink Wl-nu516u1 — versions 20251208
Weakness classification (CWE)
References
- VDB-346265 | Wavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injection (vdb-entry, technical-description)
- VDB-346265 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #751047 | Wavlink NU516U1 V251208 Command Injection (third-party-advisory)
- github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/singlePortForwardDelete.md (related)
- github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/singlePortForwardDelete.md (exploit)
Frequently asked questions
- What is CVE-2026-2615?
- CVE-2026-2615 is a high-severity vulnerability in Wavlink Wl-nu516u1, classified under Command Injection. CVSS score: 7.2/10. Published 2026-02-17.
- How severe is CVE-2026-2615?
- High severity. CVSS v3 base score is 7.2 out of 10.