Vulnerability · Published Feb 16, 2026 · Assigned by VulDB
CVE-2026-2567Wavlink WL-NU516U1 nas.cgi sub_401218 stack-based overflow
High 7.2
In plain English
A high-severity stack buffer overflow in WL-NU516U1 from Wavlink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.8%top 44.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wavlink | WL-NU516U1 | 20251208 |
Weakness: CWE-121, CWE-119 · 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
References
- VDB-346174 | Wavlink WL-NU516U1 nas.cgi sub_401218 stack-based overflow vdb-entry, technical-description
- VDB-346174 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #752016 | Wavlink NU516U1 V251208 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/nas.cgi_User1Passwd.md exploit