CVE-2026-41927
HIGHWDR201A WiFi Extender Stack-Based Buffer Overflow via firewall.cgi
Title source: cnaDescription
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.
References (3)
Core 3
Core References
Exploit technical-description
exploit
https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.html
Product product
https://www.made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/wdr201a-wifi-extender-stack-based-buffer-overflow-via-firewall-cgi
Scores
CVSS v4
8.3
EPSS
0.0040
EPSS Percentile
31.2%
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-121
Status
published
Products (2)
Shenzhen Yipu Commercial and Trading Co., Ltd/WDR201A WiFi Extender
< 1.02
Shenzhen Yipu Commercial and Trading Co., Ltd/WDR201A WiFi Extender
< 1.02.0
Published
May 04, 2026
Tracked Since
May 05, 2026