CVE-2026-41223

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 formMapDelDevice macstr 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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-41223

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 in the boa formMapDelDevice macstr functionality of TOTOLINK X2000R router firmware. It allows an attacker to execute arbitrary code by sending a specially crafted HTTP request. The vulnerability requires authentication but can be triggered remotely.

Detection Guidance

Detecting this vulnerability requires checking for vulnerable TOTOLINK X2000R firmware versions. Inspect HTTP traffic for malformed requests targeting the formMapDelDevice endpoint. Monitor for crashes or unexpected behavior in the boa web server.

Impact Analysis

An attacker could gain control of the router, steal sensitive data, or use it as a pivot point to attack other devices on the network. Since it's a router, it may also disrupt internet connectivity or enable man-in-the-middle attacks.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations using this device may face compliance violations and potential fines.

Mitigation Strategies

Immediately update TOTOLINK X2000R to the latest firmware if available. Disable remote HTTP access to the device if not required. Restrict network access to trusted sources only. Monitor for suspicious HTTP requests targeting the vulnerable endpoint.

Hi! I’m here to help you understand CVE-2026-41223. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70

EPSS Chart

Security Radar

News mentioning this vulnerability

Loading related security news...