Tenda F456 Router Vulnerability (CVE-2026-7053) Exposes Buffer Overflow
A critical buffer overflow vulnerability, CVE-2026-7053, has been identified in the Tenda F456 router, version 1.0.0.5. The National Vulnerability Database (NVD) reports that this flaw resides within the frmL7ProtForm function of the /goform/L7Prot component, specifically within the httpd process. Manipulation of the page argument can lead to remote code execution.
This is not a theoretical flaw. NVD states that a public exploit for CVE-2026-7053 is already available. With a CVSSv3 score of 8.8 (HIGH), the vulnerability allows for remote exploitation without authentication, leading to high impact on confidentiality, integrity, and availability. The ease of exploitation, coupled with public tooling, makes this an immediate threat for any organization or individual still using the affected Tenda F456 router.
The attacker’s calculus here is straightforward: target unpatched, internet-facing devices. These consumer-grade devices are often deployed in small offices or as edge devices in larger networks, frequently overlooked in patch management cycles. Their widespread deployment and common misconfigurations make them attractive targets for initial access or botnet recruitment.
What This Means For You
- If your network uses Tenda F456 routers, specifically version 1.0.0.5, you are exposed to remote code execution. Given the public availability of an exploit, assume these devices are already being scanned and targeted. Prioritize immediate replacement or isolation of these devices from your network perimeter. Do not rely on firmware updates, as a patch for this specific CVE-2026-7053 may not be forthcoming for an end-of-life product.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Tenda F456 Router Vulnerability CVE-2026-7053 - Buffer Overflow Attempt
title: Tenda F456 Router Vulnerability CVE-2026-7053 - Buffer Overflow Attempt
id: scw-2026-04-26-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit the buffer overflow vulnerability (CVE-2026-7053) in Tenda F456 routers by targeting the /goform/L7Prot endpoint with a manipulated 'page' parameter. This is a critical initial access vector.
author: SCW Feed Engine (AI-generated)
date: 2026-04-26
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7053/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/goform/L7Prot'
cs-method|exact:
- 'POST'
cs-uri-query|contains:
- 'page='
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7053 | Buffer Overflow | Tenda F456 version 1.0.0.5 |
| CVE-2026-7053 | Buffer Overflow | Vulnerable function: frmL7ProtForm in /goform/L7Prot (httpd component) |
| CVE-2026-7053 | Buffer Overflow | Vulnerable argument: page |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 27, 2026 at 01:17 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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