---
id: "CVE-2026-41222"
kind: "vulnerability"
aliases: ["CVE-2026-41222"]
title: "TOTOLINK X2000R router: crafted request overflows stack and runs code"
severity: "critical"
cvss: 9.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "TOTOLINK X2000R", "fixed": [], "affected": "TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327", "ecosystem": "firmware"}]
ecosystems: []
tags: ["boa", "firmware", "home-network", "infrastructure", "router", "totolink", "x2000r"]
not_affected_if: ["no-web-admin-exposure", "not-x2000r", "other-firmware-version", "remote-admin-disabled"]
published_at: "2026-10-20T21:17:18+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-23T23:14:44+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41222", "first_seen_at": "2026-10-23T21:57:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:14:44+00:00"}]
---

# TOTOLINK X2000R router: crafted request overflows stack and runs code

Stack overflow (strcpy of url%d POST param, CWE-121) in formParentControl of the boa web server on TOTOLINK X2000R firmware B20250421.1327. Needs admin login (CVSS 9.1, PR:H). Found by Cisco Talos; no fix known.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- firmware:TOTOLINK X2000R affected TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 fixed ?

## How to check

Router admin page > firmware version; vulnerable if TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. Check whether the admin web UI (boa, /boafrm/formLogin) is reachable from WAN or LAN you don't trust.

## Fix

No fixed firmware published as of 2026-10-23 (unknown; check totolink.net X2000R download page). Mitigate: disable WAN/remote management, change the admin password, restrict admin UI to trusted hosts, replace the device if no patch arrives.

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-41222
- 2026-10-23T23:14:44+00:00 analyst — Read Talos TALOS-2026-2392 (primary). No vendor fix or advisory found; vendor acknowledged 2026-06-25 but no patch listed. Not exploited, no public PoC (VulDB). Sibling X2000R CVEs share the same build.

## Documents

- [advisory] TALOS-2026-2392 Totolink X2000R formParentControl stack overflow https://talosintelligence.com/vulnerability_reports/TALOS-2026-2392
- [mentions] VulDB VDB-423050 https://vuldb.com/vuln/423050

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_