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CriticalVulnerabilityCVE-2026-10137updated 25 Oct 2026, 15:22 UTC

TOTOLINK X2000R router can be taken over through its upload feature

A flaw in the web upload feature of this TOTOLINK router lets a logged-in user send a specially crafted request that can run their own code on the device. That could give an attacker control of your router and the traffic passing through it

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 web interface
  2. 2Sends crafted uploadOversized data sent to the formUpload() handler
  3. 3Buffer overflowsStack memory overwritten in the boa web server
  4. 4Code runsAttacker's code executes on the router
  5. ResultAttacker controls the router

What happened

A stack-based buffer overflow in the boa web server's formUpload() function on the TOTOLINK X2000R allows arbitrary code execution via a crafted authenticated HTTP request.

Why it is dangerous: An attacker who can log in to the router's web interface could take full control of it, which puts home and small-office networks, and the devices behind them, 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, firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

What to do

  1. Check whether your router runs firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 and look for a newer firmware from TOTOLINK.
  2. Install any updated firmware from TOTOLINK as soon as it is available.
  3. Restrict access to the router's web admin interface to trusted devices and turn off remote administration from the internet.
  4. Use a strong, unique admin password for the router.

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-2026-10137 · GHSA-mc64-wjc4-x653
CVSS
9.1 / 10
EPSS
0.6% 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 can be taken over through its upload feature · Zero Radar