CVE-2026-41222

Summary

A stack-based buffer overflow in the formParentControl URL handler of the X2000R router allows authenticated attackers to overwrite stack memory and achieve remote code execution via a malicious HTTP request.

Exploitability

Exploitation requires valid authentication and sending a specially crafted HTTP request to the vulnerable endpoint; no public exploit exists yet, but the high CVSS score indicates low complexity once access is obtained.

Blast radius

Successful exploitation grants full system compromise (confidentiality, integrity, availability) on the affected device, potentially enabling pivot to internal networks or persistent backdoor installation.

Detection

Look for HTTP POST requests to /formParentControl with unusually long or malformed parameter values in web server logs; anomalies in request size or content length compared to typical usage patterns may indicate exploitation attempts.

Prioritized remediation

Upgrade to TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 or later, as this is the only version explicitly referenced in the description as affected; until then, disable remote management or restrict access to the /formParentControl endpoint to trusted IPs only.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.