CVE-2026-41927— WDR201A WiFi Extender Stack-Based Buffer Overflow via firewall.cgi
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I. Basic Information for CVE-2026-41927
Vulnerability Information
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Vulnerability Title
WDR201A WiFi Extender Stack-Based Buffer Overflow via firewall.cgi
Source: NVD (National Vulnerability Database)
Vulnerability Description
WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains a stack-based buffer overflow vulnerability in the firewall.cgi and makeRequest.cgi binaries that allows unauthenticated attackers to overwrite the saved return address by sending a POST request with a Content-Length header exceeding 512 bytes. Attackers can exploit insufficient length validation in the fgets() call to achieve arbitrary code execution through return-oriented programming or return-to-libc techniques.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Yeapook WDR201A WiFi Extender 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yeapook WDR201A WiFi Extender是Yeapook公司的一款无线信号扩展设备。 Yeapook WDR201A WiFi Extender HW V2.1版本和FW LFMZX28040922V1.02版本存在安全漏洞，该漏洞源于firewall.cgi和makeRequest.cgi二进制文件中存在基于栈的缓冲区溢出，可能导致未经身份验证的攻击者覆盖保存的返回地址。
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 |
|---|---|---|---|---|
| Shenzhen Yipu Commercial and Trading Co., Ltd | WDR201A WiFi Extender | 0 ~ 1.02.0 | - |
II. Public POCs for CVE-2026-41927
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Shenzhen Yipu Commercial and Trading Co., Ltd · 2026-05-04 · 6 CVEs total
| CVE-2026-41924 | WDR201A WiFi Extender OS Command Injection via makeRequest.cgi | |
| CVE-2026-41925 | WDR201A WiFi Extender OS Command Injection via adm.cgi (reboot_time) | |
| CVE-2026-41922 | WDR201A WiFi Extender OS Command Injection via wireless.cgi | |
| CVE-2026-41926 | WDR201A WiFi Extender OS Command Injection via firewall.cgi | |
| CVE-2026-41923 | WDR201A WiFi Extender OS Command Injection via internet.cgi |
IV. Related Vulnerabilities
Same product: WDR201A WiFi Extender
- CVE-2026-41926
WDR201A WiFi Extender OS Command Injection via firewall.cgi - CVE-2026-41925
WDR201A WiFi Extender OS Command Injection via adm.cgi (rebo - CVE-2026-41924
WDR201A WiFi Extender OS Command Injection via makeRequest.c - CVE-2026-41923
WDR201A WiFi Extender OS Command Injection via internet.cgi - CVE-2026-41922
WDR201A WiFi Extender OS Command Injection via wireless.cgi
Same vendor: Shenzhen Yipu Commercial and Trading Co., Ltd
- CVE-2026-41926
WDR201A WiFi Extender OS Command Injection via firewall.cgi - CVE-2026-41925
WDR201A WiFi Extender OS Command Injection via adm.cgi (rebo - CVE-2026-41924
WDR201A WiFi Extender OS Command Injection via makeRequest.c - CVE-2026-41923
WDR201A WiFi Extender OS Command Injection via internet.cgi - CVE-2026-41922
WDR201A WiFi Extender OS Command Injection via wireless.cgi
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2026-41927
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