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CriticalVulnerabilityCVE-2026-10138updated 25 Oct 2026, 15:22 UTC

TOTOLINK X2000R router can run attacker commands via upload function

A flaw in the router's file upload feature lets someone who can log in send a crafted web request that makes the router run commands they choose. That can give them 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 HTTP requestSent to the upload handler formUpload()
  3. 3Command injectionInput reaches the OS shell unsanitized
  4. 4Code executes on routerAttacker runs arbitrary commands
  5. ResultAttacker controls the router

What happened

An OS command injection flaw exists in the boa formUpload() function of the TOTOLINK X2000R, allowing arbitrary code execution via a specially crafted authenticated HTTP request.

Why it is dangerous: An attacker who controls the router can read or redirect traffic, change settings, and use the device to reach other systems on the network. Home and small-office users of this router are at risk.

Are you affected?

You are affected if you run the TOTOLINK X2000R router with firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 and its web management interface is reachable by untrusted users or the internet.

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

What to do

  1. Check whether your router runs TOTOLINK X2000R firmware B20250421.1327 and look for an updated firmware from TOTOLINK.
  2. Install any vendor firmware update as soon as it is available.
  3. Turn off remote web management and do not expose the router's admin page to the internet.
  4. Change the router's admin password to a strong, unique one.

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-2026-10138 · GHSA-fxrm-2vm6-776j
CVSS
9.1 / 10
EPSS
1.4% 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 run attacker commands via upload function · Zero Radar