---
id: "CVE-2026-35499"
kind: "vulnerability"
aliases: ["CVE-2026-35499"]
title: "Totolink X2000R router: crafted request runs OS commands via formWsc"
severity: "critical"
cvss: 9.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Totolink X2000R firmware", "fixed": [], "affected": "TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327", "ecosystem": "hardware"}]
ecosystems: []
tags: ["command-injection", "infrastructure", "routers", "self-hosted", "totolink", "x2000r"]
not_affected_if: ["auth-required", "different-firmware-version", "managed-hosting", "no-web-admin-exposed"]
published_at: "2026-10-20T21:17:18+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-23T23:15:48+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35499", "first_seen_at": "2026-10-23T21:57:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:15:48+00:00"}]
---

# Totolink X2000R router: crafted request runs OS commands via formWsc

Totolink X2000R firmware B20250421.1327 has an OS command injection in the boa web server's /boafrm/formWsc handler. The peerRptPin POST parameter (used when setRptPIN is set and setPIN is empty) is put into a system() call unescaped, so a logged-in admin session can run any command as the router's OS user. CVSS 9.1 (PR:H). Found by Cisco Talos. The vendor acknowledged the report in June 2026, and no fixed firmware has been published.

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

## Affected

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

## How to check

Open the router admin page, go to system info/firmware, and compare with TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327; that build is the only one confirmed vulnerable. Also check whether the admin web UI is reachable from WAN (remote management enabled, or a port forward to the router's web port) from outside your network.

## Fix

No fixed firmware known as of 2026-10-23. Mitigate: disable WAN/remote management, restrict the admin UI to a trusted LAN host, change the default admin password, and check totolink.net for newer X2000R firmware. Consider replacing the device if no patch ships.

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-35499
- 2026-10-23T23:15:48+00:00 analyst — Read Talos TALOS-2026-2387 (primary) and NVD JSON. Authenticated (admin login) command injection: peerRptPin POST param goes unescaped into system() in formWsc. No vendor fix: Zioncom acknowledged 2026-06-25, no patch by Talos's last follow-up 2026-09-15. No PoC link, no exploitation seen, no X chatter. Sibling X2000R CVEs share the same build.

## Documents

- [advisory] TALOS-2026-2387: Totolink X2000R boa formWsc peerRptPin OS command injection https://talosintelligence.com/vulnerability_reports/TALOS-2026-2387
- [describes] NVD record CVE-2026-35499 https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-35499

## From the sources

An os command injection vulnerability exists in the boa formWsc peerRptPin functionality of Totolink X2000R 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_