---
title: "CVE-2026-42022: Totolink X2000R - Remote Code Execution"
description: "Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 contains a stack-based buffer overflow caused by improper handling of the static_dns2 parameter in formIpv6Setup static network configuration, letting authenticated attackers execute arbitrary code remotely, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-42022/
---

# CVE-2026-42022 Totolink X2000R - Remote Code Execution

Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 contains a stack-based buffer overflow caused by improper handling of the static\_dns2 parameter in formIpv6Setup static network configuration, letting authenticated attackers execute arbitrary code remotely, exploit requires authentication.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-42022)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Published

20 October 2026

Updated

21 October 2026

Weakness

[CWE-121](https://cwe.mitre.org/data/definitions/121.html)

## Vendor fix

Update to the latest firmware version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-42022](https://nvd.nist.gov/vuln/detail/CVE-2026-42022)
- [https://talosintelligence.com/vulnerability\_reports/TALOS-2026-2395](https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)