Buffer overflow in Wavlink Wl-Nu516u1
CVE-2026-2567
A vulnerability was detected in Wavlink WL-NU516U1 20251208. This vulnerability affects the function sub_401218 of the file /cgi-bin/nas.cgi. Performing a manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.008 · change: -0.004
Affected products
- Wavlink Wl-Nu516u1 — versions 20251208
- Wavlink Wl-Nu516u1 Firmware
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/nas.cgi_User1Passwd.md (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-2567?
- CVE-2026-2567 is a high-severity vulnerability in Wavlink Wl-Nu516u1, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.2/10. Published 2026-02-16.
- How severe is CVE-2026-2567?
- High severity. CVSS v3 base score is 7.2 out of 10.