CVE-2026-41222

Deferred Deferred - Pending Action

Stack-Based Buffer Overflow in TOTOLINK X2000R

Publication date: 2026-10-20

Last updated on: 2026-10-28

Assigner: Talos

Description

A stack-based buffer overflow vulnerability exists in the boa formParentControl url functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

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Meta Information

Published

2026-10-20

Last Modified

2026-10-28

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-41222

Affected Vendors & Products

Vendor	Product	Version / Range
totolink	Totolink	TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This is a stack-based buffer overflow vulnerability in the TOTOLINK X2000R router firmware (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). It occurs in the formParentControl url functionality. An attacker can send a specially crafted HTTP request to trigger the overflow, potentially leading to arbitrary code execution. The attack requires authentication.

Detection Guidance

Detecting this vulnerability requires checking for the presence of TOTOLINK X2000R devices with firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 or earlier. Inspect network traffic for malformed HTTP requests targeting the formParentControl functionality.

Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on the affected device. This could lead to unauthorized access, control of the router, or further compromise of the network. Since the router is a network gateway, compromise could expose connected devices to additional attacks.

Compliance Impact

This vulnerability allows arbitrary code execution via crafted HTTP requests, which could lead to unauthorized access or data breaches. Such breaches may violate GDPR (data protection) and HIPAA (health data security) by exposing sensitive information. Compliance risks include potential fines, legal liabilities, and reputational damage due to inadequate security controls.

Mitigation Strategies

Immediately update the TOTOLINK X2000R firmware to the latest patched version. If an update is unavailable, restrict access to the device's web interface from untrusted networks and disable the formParentControl feature if possible.

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