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CriticalVulnerabilityCVE-2026-28763updated 25 Oct 2026, 15:22 UTC

TOTOLINK X2000R router can be taken over through a crafted web request

A logged-in attacker can send a specially built web request to this router and run their own commands on it. That can let them control the device and the network behind 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 admin credentials
  2. 2Crafted HTTP requestSent to the router's web interface
  3. 3Buffer overflowformMapDelDevice hostname handler overruns stack
  4. 4Code executionAttacker runs commands on the router
  5. ResultAttacker controls the router

What happened

A stack-based buffer overflow in the boa web server's formMapDelDevice hostname handler on TOTOLINK X2000R (firmware TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) allows arbitrary code execution via an authenticated HTTP request.

Why it is dangerous: Successful exploitation gives the attacker code execution on the router, so they could intercept or redirect traffic and reach other devices on the home or office network. Anyone running this router with its web interface exposed is at risk.

Are you affected?

You are affected if you run a 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 the router's firmware version in its admin page and compare it to TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.
  2. Check TOTOLINK's website or support channels for a newer firmware release and install it if available.
  3. Restrict access to the router's web admin interface so only trusted devices can reach it, and do not expose it to the internet.
  4. Use a strong, unique admin password to limit who can make authenticated requests.

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-2026-28763 · GHSA-5w2g-62c4-vvv7
CVSS
9.1 / 10
EPSS
0.7% 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 a crafted web request · Zero Radar