Is CVE-2026-10139 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-10139 being exploited in the wild.

How severe is CVE-2026-10139?

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

Which products and versions are affected?

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

Is there a fix for CVE-2026-10139?

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-2026-10139 attacked?

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

Am I affected by CVE-2026-10139?

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-2026-10139: Totolink X2000R stack-based buffer overflow in Mcli

CVE-2026-10139 · Severity: critical · CVSS 9.1 · Published 2026-10-20

The Totolink X2000R is a home router used worldwide for network connectivity and wireless mesh networking. A stack-based buffer overflow in the router's Mcli functionality allows an authenticated attacker to execute arbitrary code on the device via a specially crafted HTTP request, potentially giving an attacker complete control of the router to intercept traffic, redirect users to malicious sites, or use it as a foothold for network attacks.

Technologies: TOTOLINK X2000r. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-10139 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-10139 being exploited in the wild.
How severe is CVE-2026-10139?: Critical severity, with a CVSS score of 9.1, published 20 October 2026.
Which products and versions are affected?: TOTOLINK X2000r TOTOLIK-X2000R-Gh-V1.0.0-B20250421.1327.
Is there a fix for CVE-2026-10139?: 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-2026-10139 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-10139?: 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

A stack-based buffer overflow (CWE-121) exists in the Mcli functionality of the Totolink X2000R firmware. The vulnerability is triggered through authenticated HTTP POST requests to the /boafrm/formUpload endpoint when mesh mode is enabled, allowing an attacker to overflow a stack buffer and achieve arbitrary code execution with the privileges of the web server process.

Affected products

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

Timeline

2026-10-20: disclosed

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2439

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