CVE-2026-3715— Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow
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I. Basic Information for CVE-2026-3715
Vulnerability Information
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Vulnerability Title
Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wavlink WL-WN579X3-C 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wavlink WL-WN579X3-C是中国睿因（Wavlink）公司的一款无线网络扩展器。 Wavlink WL-WN579X3-C 231124版本存在安全漏洞，该漏洞源于对文件/cgi-bin/firewall.cgi中参数del_flag的错误操作，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Wavlink | WL-WN579X3-C | 231124 | - |
II. Public POCs for CVE-2026-3715
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|---|
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Same Patch Batch · Wavlink · 2026-03-08 · 4 CVEs total
| CVE-2026-3703 | 9.8 CRITICAL | Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write |
| CVE-2026-3704 | 4.7 MEDIUM | Wavlink NU516U1 Incomplete Fix CVE-2025-10959 firewall.cgi sub_405B2C command injection |
| CVE-2026-3716 | 2.4 LOW | Wavlink WL-WN579X3-C adm.cgi sub_401AD4 cross site scripting |
IV. Related Vulnerabilities
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Wavlink NU516U1 wireless.cgi advance os command injection - CVE-2026-8227
Wavlink NU516U1 adm.cgi wzdapMesh os command injection - CVE-2026-8192
Wavlink NU516U1 adm.cgi wzdap os command injection
Same weakness: CWE-121
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V. Comments for CVE-2026-3715
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