Tenda F456 Router Vulnerability (CVE-2026-7019) Exposes Networks to Remote Attacks
The National Vulnerability Database has detailed CVE-2026-7019, a critical buffer overflow vulnerability in the Tenda F456 router, version 1.0.0.5. Specifically, the fromP2pListFilter function within the /goform/P2pListFilter file is susceptible when handling the menufacturer/Go argument. This flaw allows for remote exploitation, a severe concern given the widespread deployment of such devices in home and small office environments.
This isn’t theoretical; an exploit for CVE-2026-7019 is publicly available. A CVSSv3.1 score of 8.8 (High) confirms the gravity: an unauthenticated attacker can achieve high impact on confidentiality, integrity, and availability simply by sending a crafted request over the network. The low attack complexity and lack of user interaction make this a prime target for automated scanning and exploitation.
For defenders, this means Tenda F456 routers running the affected firmware are low-hanging fruit. Attackers prioritize easy wins, and an unpatched, internet-facing device with a public exploit is exactly that. Expect to see this vulnerability weaponized by opportunistic threat actors looking to gain initial access, establish persistence, or pivot into internal networks.
What This Means For You
- If your organization or remote workers use Tenda F456 1.0.0.5 routers, assume compromise until proven otherwise. Immediately verify firmware versions and apply any available patches or mitigations. If no patch exists, consider replacing these devices or isolating them from critical networks. Audit network logs for unusual activity originating from or targeting these routers.
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 P2pListFilter Buffer Overflow Attempt (CVE-2026-7019)
title: Tenda F456 Router P2pListFilter Buffer Overflow Attempt (CVE-2026-7019)
id: scw-2026-04-26-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit the Tenda F456 router vulnerability (CVE-2026-7019) by targeting the /goform/P2pListFilter endpoint with a crafted 'menufacturer/Go' parameter, which triggers a buffer overflow. This is a critical initial access vector.
author: SCW Feed Engine (AI-generated)
date: 2026-04-26
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7019/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/goform/P2pListFilter'
cs-uri-query|contains:
- 'menufacturer/Go'
cs-method:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7019 | Buffer Overflow | Tenda F456 version 1.0.0.5 |
| CVE-2026-7019 | Buffer Overflow | Vulnerable function: fromP2pListFilter |
| CVE-2026-7019 | Buffer Overflow | Vulnerable file: /goform/P2pListFilter |
| CVE-2026-7019 | Buffer Overflow | Vulnerable argument: menufacturer/Go |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 26, 2026 at 08:16 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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