CVE-2026-18589
Wavlink WL-NU516U1 nas.cgi change_password stack-based overflow
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Reserved
- Aug 2, 2026
Description
A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | VulDB |
| 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | VulDB |
| 2.0 | 10.0 High | AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
WL-NU516U1Wavlink |
|
References
- VDB-385417 | Wavlink WL-NU516U1 nas.cgi change_password stack-based overflowvdb-entrytechnical-description
- VDB-385417 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-18589 | CVE Analysis and Reportthird-party-advisory
- Submit #850501 | WAVLINK NU516U1 2026-05-15 (build 708c073-mt7628) Command Injectionthird-party-advisory
- https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.mdbroken-link
- https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.binbroken-linkpatch
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