Buffer overflow in Wavlink Wl-nu516u1
CVE-2026-3613
A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (34.6th 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 V240425
Weakness classification (CWE)
References
- VDB-349221 | Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow (vdb-entry, technical-description)
- VDB-349221 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #755341 | Wavlink NU516U1 V240425 Stack-based Buffer Overflow (third-party-advisory)
- github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/ipaddr_Stack Buffer Overflow… (exploit)
Frequently asked questions
- What is CVE-2026-3613?
- CVE-2026-3613 is a high-severity vulnerability in Wavlink Wl-nu516u1, classified under Stack-based Buffer Overflow. CVSS score: 7.2/10. Published 2026-03-06.
- How severe is CVE-2026-3613?
- High severity. CVSS v3 base score is 7.2 out of 10.