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CriticalVulnerabilityCVE-2026-10141updated 25 Oct 2026, 15:22 UTC

TOTOLINK X2000R router accepts unsigned firmware updates

The router's update feature does not check whether a firmware file is genuine. Someone who can log in to the router could install a modified firmware file and take full control of the device.

Official, 2 sources
SeverityCriticalCVSS 9.1 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Attacker logs inNeeds valid authenticated access to the router
  2. 2Crafted firmware fileModified binary is uploaded to the update feature
  3. 3Unsigned update acceptedRouter does not verify the firmware signature
  4. 4Malicious firmware runsAttacker code replaces the legitimate firmware
  5. ResultAttacker controls the router

What happened

The boa-based Firmware Update function on the TOTOLINK X2000R does not verify firmware signatures, allowing arbitrary firmware to be written via an authenticated HTTP request.

Why it is dangerous: An attacker who installs malicious firmware can control the router, intercept or redirect traffic, and reach devices on the home or office network. Anyone using this router version is at risk.

Are you affected?

You are affected if you run TOTOLINK X2000R with firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.

TOTOLINK X2000R, version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

What to do

  1. Check the router's firmware version in its admin page and confirm whether it matches the affected build.
  2. Check the vendor's website or support channels for a newer firmware that fixes this issue, and install it when available.
  3. Restrict router admin access to trusted devices and change the admin password to a strong, unique one.
  4. Consider replacing the device if no fixed firmware is released.

Timeline

  1. 20 Oct 2026, 21:17 UTC
    Publicly disclosed
  2. 20 Oct 2026, 21:17 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 15:22 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-10141 · GHSA-hvg9-6xm4-6qvj
CVSS
9.1 / 10
EPSS
0.3% chance of exploitation within 30 days
Disclosed
20 Oct 2026, 21:17 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 15:22 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

TOTOLINK X2000R router accepts unsigned firmware updates · Zero Radar