---
id: "CVE-2026-10133"
kind: "vulnerability"
aliases: ["CVE-2026-10133"]
title: "TOTOLINK X2000R router: batchupg overflow lets an attacker run code"
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": "vendor"}]
ecosystems: []
tags: ["infrastructure", "iot", "rce", "router", "self-hosted", "totolink", "x2000r"]
not_affected_if: ["auth-required", "other-models", "wan-admin-disabled"]
published_at: "2026-10-20T21:17:16+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-23T23:18:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10133", "first_seen_at": "2026-10-23T21:57:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:18:03+00:00"}]
---

# TOTOLINK X2000R router: batchupg overflow lets an attacker run code

Stack buffer overflow in the batchupg helper binary on the TOTOLINK X2000R (CWE-121, CVSS 9.1). An authenticated admin POST to /boafrm/formBuploadSetting starts batchupg, which listens for UDP broadcast on port 13977. A crafted packet's csid field overflows a stack buffer in send_broadcast_resp and gives code execution as the router. Talos reached a crash with control of the program counter. No vendor patch is known.

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

## Affected

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

## How to check

In the router admin page, read the firmware version. You are affected if it is TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. No command is published. Also check whether the web admin is reachable from the WAN (remote management setting) and whether untrusted devices share your LAN.

## Fix

unknown: no fixed firmware is named by Talos, the CVE record or the sources found. Check totolink.net X2000R product page (https://www.totolink.net/home/menu/newstpl/menu_newstpl/products/id/242.html) for newer firmware. Meanwhile, turn off remote/WAN admin, use a strong unique admin password, and keep untrusted devices off the LAN.

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-10133
- 2026-10-23T23:18:03+00:00 analyst — Primary source Talos TALOS-2026-2434 (Lilith Wyatt, disclosed 2026-10-20) plus CVE record. Only build B20250421.1327 listed; no vendor fix or advisory found; no X posts, no public PoC link (Talos gives a trigger sketch), not in KEV.

## Documents

- [advisory] TALOS-2026-2434 Totolink X2000R batchupg stack-based buffer overflow https://talosintelligence.com/vulnerability_reports/TALOS-2026-2434
- [advisory] CVE Record: CVE-2026-10133 https://www.cve.org/CVERecord?id=CVE-2026-10133

## From the sources

A stack-based buffer overflow vulnerability exists in the batchupg 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_