CVE-2026-2567 Details
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.
A stack-based buffer overflow vulnerability has been identified in the Wavlink NU516U1 printer server, specifically in the NAS settings processing function of the CGI component. This vulnerability arises from improper handling of the 'User1Passwd' parameter, which is subjected to a character escaping routine that inadvertently doubles the data length. The expanded input exceeds the capacity of a fixed-size stack buffer, allowing for overwriting of critical execution control data, including the return address, and potentially leading to arbitrary code execution.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 17, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/nas.cgi_User1Passwd.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.346174 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.346174 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.752016 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wavlink wl-nu516u1 firmware | <= 2025-12-08 |
CPE
Remediation
| |
| wavlink wl-nu516u1 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 16, 2026 | New CVE Received | [email protected] |