CVE-2026-41927

HighCVSS 8.3/10Last modified Oct 26, 2026

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.

Metrics

CVSS 4.0 8.3/10CVSS: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

Weakness enumeration

CWE-121

Affected software

VendorProductVersions
Shenzhen Yipu Commercial and Trading Co., LtdWDR201A WiFi Extender<= 1.02.0

References

Timeline

Published
May 4, 2026
Last modified
Oct 26, 2026
NVD status
Deferred

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CVE-2026-41927: High severity, CVSS 8.3 | Vulnix