How do I check whether I am affected by CVE-2026-42024?

Open the router admin page and read the firmware version. Build TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 is confirmed vulnerable; no other builds are listed either way, so treat all X2000R firmware as affected. Check whether the admin web interface answers from the WAN side (remote management setting), for example by testing the router's public IP from outside your network.

What is the fix for CVE-2026-42024?

unknown: no fixed firmware found. Check totolink.net X2000R product page for a newer build. Until then: turn off remote/WAN web management, change the admin password to a strong unique one, and restrict LAN access to the admin page.

Who is not affected by CVE-2026-42024?

Not affected if: auth-required, no-ipv6-static-config, other-router-models.

Live › vulnerability › CVE-2026-42024

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critical9.1Infrastructure

TOTOLINK X2000R router: crafted request overflows stack and runs code

Stack buffer overflow in the boa web server's formIpv6Setup handler on the TOTOLINK X2000R. The static_gw parameter is copied to the stack with no bounds check. An attacker with admin login can send a crafted HTTP request and run code on the router. Found by Cisco Talos. No vendor fix is published.

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: Code runs on the router with attacker-chosen commands after a crafted request.
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-2026-42024

Go to dashboard

critical9.1Infrastructure

TOTOLINK X2000R router: crafted request overflows stack and runs code

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: Code runs on the router with attacker-chosen commands after a crafted request.
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: crafted request overflows stack and runs code

Why it is critical, and not just CVSS

Who is affected

Know the next one before it finds you.

TOTOLINK X2000R router: crafted request overflows stack and runs code

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