How do I check whether I am affected by CVE-2026-10136?

In the router admin UI, open the firmware/status page and read the firmware version. TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 is confirmed vulnerable; other builds are untested, so treat them as unknown. Also check whether remote/WAN web management is enabled, and whether the LAN is reachable by untrusted clients.

What is the fix for CVE-2026-10136?

No vendor fix published as of 2026-10-23 (checked Talos, CVE record). Mitigate: disable WAN/remote admin, set a strong unique admin password, restrict the admin UI to a trusted LAN host, and watch totolink.net for newer firmware.

Who is not affected by CVE-2026-10136?

Not affected if: auth-required, other-firmware-versions, wan-admin-disabled, web-admin-disabled.

Live › vulnerability › CVE-2026-10136

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critical9.1Infrastructure

TOTOLink X2000R router: heap overflow in upload handler allows code execution

Heap overflow in the boa web server on the TOTOLINK X2000R. The filename in a multipart upload to /boafrm/formUpload (or formUploadFile) is copied with a length taken from the input itself, so it can overwrite the heap and run code. It needs an authenticated admin session (CVSS 9.1, PR:H). Talos disclosed it on 2026-10-20 after the vendor stayed silent. No fixed firmware is known.

Summary written from the sources below. Check the originals before acting.

CVSS 3.x

9.1

critical

scored by [email protected]

known so far5 of 6

missing: exploitation

First public: Oct 20, 2026 UTC
Last modified: Oct 23, 2026
Status: open
Known exploitation: None reported
Public exploit: None on GitHub
EPSS: not scored

First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.

Why it is critical, and not just CVSS

Likelihood → · Impact ↓

critical

high

medium

high

medium

low

medium

low

Exploited: No reports yet.
Needs login: Yes.
Needs a special setup: Not known from the sources.
Reachable from: network.
Worst case: Attacker runs code on the router as an authenticated user.
CVSS said: 9.1. The facts above say medium; we keep the sources' critical until an analyst looks.

Who is affected

1 product

Know the next one before it finds you.

Add to Slack

Live › vulnerability › CVE-2026-10136

Go to dashboard

critical9.1Infrastructure

TOTOLink X2000R router: heap overflow in upload handler allows code execution

Summary written from the sources below. Check the originals before acting.

CVSS 3.x

9.1

critical

scored by [email protected]

known so far5 of 6

missing: exploitation

First public: Oct 20, 2026 UTC
Last modified: Oct 23, 2026
Status: open
Known exploitation: None reported
Public exploit: None on GitHub
EPSS: not scored

First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.

Why it is critical, and not just CVSS

Likelihood → · Impact ↓

critical

high

medium

high

medium

low

medium

low

Exploited: No reports yet.
Needs login: Yes.
Needs a special setup: Not known from the sources.
Reachable from: network.
Worst case: Attacker runs code on the router as an authenticated user.
CVSS said: 9.1. The facts above say medium; we keep the sources' critical until an analyst looks.

Who is affected

1 product

Know the next one before it finds you.

Add to Slack

TOTOLink X2000R router: heap overflow in upload handler allows code execution

Why it is critical, and not just CVSS

Who is affected

Know the next one before it finds you.

TOTOLink X2000R router: heap overflow in upload handler allows code execution

Why it is critical, and not just CVSS

Who is affected

Know the next one before it finds you.

How to check

The fix

Who had it, and when

What the sources say, verbatim

Sources