Description
A heap-based buffer overflow vulnerability exists in the boa formUpload() functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
Published: 2026-10-20
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

A heap-based buffer overflow exists in the boa formUpload() function of the Totolink X2000R router. The overflow is triggered by a specially crafted HTTP request and allows an authenticated attacker to execute arbitrary code. The vulnerability is classified as CWE-122. If exploited, an attacker who already has valid credentials can run code on the device, potentially taking full control of the system.

Affected Systems

The affected product is the Totolink X2000R router with firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 from the vendor Totolink.

Risk and Exploitability

The CVSS score of 9.1 indicates a high severity risk. No EPSS score is currently available, and the vulnerability is not listed in the CISA KEV catalog. The attack vector appears to be network-based, requiring an authenticated HTTP session to the device's web interface. Because the flaw enables arbitrary code execution, the risk remains significant even without widespread exploitation data.

Generated by OpenCVE AI on October 20, 2026 at 22:11 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the official firmware update that addresses the boa formUpload() heap overflow.
  • If a patch is not yet available, disable the boa formUpload feature in the router’s settings.
  • Restrict web interface access to trusted IP addresses and enforce strong authentication; limit administrator privileges.

Generated by OpenCVE AI on October 20, 2026 at 22:11 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 23 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 22 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink x2000r
Vendors & Products Totolink
Totolink x2000r

Tue, 20 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
Title Heap Buffer Overflow in Totolink X2000R boa formUpload() Enables Remote Code Execution

Tue, 20 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
Description A heap-based buffer overflow vulnerability exists in the boa formUpload() functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

Subscriptions

Totolink X2000r
cve-icon MITRE

Status: PUBLISHED

Assigner: talos

Published:

Updated: 2026-10-23T22:11:53.227Z

Reserved: 2026-05-29T18:40:10.785Z

Link: CVE-2026-10136

cve-icon Vulnrichment

Updated: 2026-10-23T20:45:03.676Z

cve-icon NVD

Status : Deferred

Published: 2026-10-20T21:17:16.360

Modified: 2026-10-23T23:17:41.867

Link: CVE-2026-10136

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T15:00:41Z

Weaknesses
  • CWE-122

    Heap-based Buffer Overflow