---
id: "CVE-2026-10138"
kind: "vulnerability"
aliases: ["CVE-2026-10138"]
title: "TOTOLINK X2000R router: crafted upload request runs OS commands"
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: ["auth-required-rce", "home-router", "infrastructure", "soho", "totolink-x2000r"]
not_affected_if: ["auth-required", "managed-hosting", "wan-management-disabled"]
published_at: "2026-10-20T21:17:16+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-23T23:16:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10138", "first_seen_at": "2026-10-23T21:57:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:16:58+00:00"}]
---

# TOTOLINK X2000R router: crafted upload request runs OS commands

In the TOTOLINK X2000R boa web server, formUpload() builds an Mcli shell command from the devicemac%d POST parameters (only when easy-mesh mode is on) and runs it with system() without sanitising. An authenticated attacker gets root-level command execution on the router. CVSS 9.1 (Talos). No vendor fix is published; Talos disclosed after three months of follow-ups.

_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

Open the router admin page and read the firmware version. TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 is confirmed vulnerable; other builds are untested, so treat them as unknown. Exploitation needs a login to /boafrm/formLogin; the Talos code path also needs easy-mesh enabled (or settable by the attacker). Check if the admin UI answers from the WAN side.

## Fix

No fixed firmware as of 2026-10-23 (none named by Talos, NVD or TOTOLINK). Mitigate: disable WAN/remote management, change the default admin password, turn off easy-mesh if unused, keep the admin UI on a trusted LAN only, and watch the TOTOLINK X2000R download page for a newer build.

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-10138
- 2026-10-23T23:16:58+00:00 analyst — Read Talos TALOS-2026-2438 (primary): only build B20250421.1327 confirmed; no fix, vendor acked 2026-06-25 but silent through 2026-09-15. No PoC link or exploitation found; social not searched (no CVE-id chatter expected). WAN default exposure not documented.

## Documents

- [advisory] TALOS-2026-2438 Totolink X2000R boa formUpload() OS command injection https://talosintelligence.com/vulnerability_reports/TALOS-2026-2438
- [mentions] NVD CVE-2026-10138 https://nvd.nist.gov/vuln/detail/CVE-2026-10138

## From the sources

A OS command injection vulnerability exists in the boa formUpload() 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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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_