Is CVE-2026-42022 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-42022 being exploited in the wild.

How severe is CVE-2026-42022?

Critical severity, with a CVSS score of 9.1, published 20 October 2026.

Which products and versions are affected?

TOTOLINK X2000r TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.

Is there a fix for CVE-2026-42022?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-42022 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-42022?

Check whether you run TOTOLINK X2000r at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-42022: Totolink X2000R stack-based buffer overflow in formIpv6Setup

CVE-2026-42022 · Severity: critical · CVSS 9.1 · Published 2026-10-20

The Totolink X2000R is a home router with network configuration features. Multiple stack-based buffer overflows in the static network configuration functionality allow an authenticated attacker to execute arbitrary code on the device by sending specially crafted HTTP requests. This could give an attacker complete control over the router, enabling data theft, network monitoring, or use as an attack platform.

Technologies: TOTOLINK X2000r. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-42022 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-42022 being exploited in the wild.
How severe is CVE-2026-42022?: Critical severity, with a CVSS score of 9.1, published 20 October 2026.
Which products and versions are affected?: TOTOLINK X2000r TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.
Is there a fix for CVE-2026-42022?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-42022 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-42022?: Check whether you run TOTOLINK X2000r at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Multiple stack-based buffer overflows exist in the formIpv6Setup functionality of the boa web server, affecting parameters including static_dns1 and static_dns2 (CWE-121). These parameters are copied directly to the stack without bounds checking. An authenticated attacker can exploit these via HTTP requests to achieve arbitrary code execution; the vulnerability has been confirmed with crash dumps showing register/PC control.

Affected products

Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

Timeline

2026-10-20: disclosed

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395

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