How do I check whether I am affected by CVE-2026-41222?

Router admin page > firmware version; vulnerable if TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. Check whether the admin web UI (boa, /boafrm/formLogin) is reachable from WAN or LAN you don't trust.

What is the fix for CVE-2026-41222?

No fixed firmware published as of 2026-10-23 (unknown; check totolink.net X2000R download page). Mitigate: disable WAN/remote management, change the admin password, restrict admin UI to trusted hosts, replace the device if no patch arrives.

Who is not affected by CVE-2026-41222?

Not affected if: no-web-admin-exposure, not-x2000r, other-firmware-version, remote-admin-disabled.

Live › vulnerability › CVE-2026-41222

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critical9.1Infrastructure

TOTOLINK X2000R router: crafted request overflows stack and runs code

Stack overflow (strcpy of url%d POST param, CWE-121) in formParentControl of the boa web server on TOTOLINK X2000R firmware B20250421.1327. Needs admin login (CVSS 9.1, PR:H). Found by Cisco Talos; no fix 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 with full device control.
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-2026-41222

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: Attacker runs code on the router with full device control.
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