CVE-2026-4861
Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow
- State
- Published
- Severity
- 8.7 High
- Published
- Mar 26, 2026
- Updated
- Mar 26, 2026
- Reserved
- Mar 25, 2026
Description
A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 8.8 High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
WL-NU516U1Wavlink |
|
References
- VDB-353192 | Wavlink WL-NU516U1 nas.cgi ftext stack-based overflowvdb-entrytechnical-description
- VDB-353192 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #776217 | Wavlink NU516U1 V260227 Stack-based Buffer Overflowthird-party-advisory
- https://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.mdexploit
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