CVE-2026-7054: Tenda F456 Router Buffer Overflow Critical for Defenders
The National Vulnerability Database has identified CVE-2026-7054, a high-severity buffer overflow vulnerability in Tenda F456 1.0.0.5 routers. This flaw exists within the fromPptpUserAdd function of the /goform/PPTPDClient component, specifically when handling the opttype/usernamewith argument. Attackers can exploit this remotely, leading to severe compromise.
With a CVSSv3.1 score of 8.8 (High), this vulnerability presents a significant risk. Its network-exploitable nature and low privileges required for execution mean attackers can achieve high confidentiality, integrity, and availability impacts. The public availability of an exploit further escalates the threat, making these devices prime targets for opportunistic attacks.
For defenders, this is not theoretical. Unpatched Tenda F456 routers are exposed. Attackers can leverage this to gain control, pivot deeper into networks, or establish persistent access. The implications for small businesses or home networks relying on these devices are substantial, potentially leading to data exfiltration or device hijacking.
What This Means For You
- If your organization or home network uses Tenda F456 1.0.0.5 routers, you need to assess your exposure immediately. This is a critical remote buffer overflow with a public exploit. Patching is paramount, but if no patch is available, isolating these devices or replacing them should be a priority to prevent remote takeover.
Related ATT&CK Techniques
🛡️ Detection Rules
5 rules · 6 SIEM formats5 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.
Web Application Exploitation Attempt — CVE-2026-7054
title: Web Application Exploitation Attempt — CVE-2026-7054
id: scw-2026-04-26-1
status: experimental
level: high
description: |
Detects common exploitation patterns targeting web applications. Review CVE-2026-7054 advisories for specific indicators.
author: SCW Feed Engine (auto-generated)
date: 2026-04-26
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7054/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- '..'
- 'SELECT'
- 'UNION'
- '<script'
- 'cmd='
- '/etc/passwd'
condition: selection
falsepositives:
- Legitimate activity from CVE-2026-7054
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7054 | Buffer Overflow | Tenda F456 version 1.0.0.5 |
| CVE-2026-7054 | Buffer Overflow | Vulnerable function: fromPptpUserAdd |
| CVE-2026-7054 | Buffer Overflow | Vulnerable file: /goform/PPTPDClient |
| CVE-2026-7054 | Buffer Overflow | Vulnerable component: httpd |
| CVE-2026-7054 | Buffer Overflow | Manipulation of argument: opttype/usernamewith |
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.
Believe this infringes your rights? Submit a takedown request.
Related coverage
itsourcecode Construction Management System SQLi: CVE-2026-7073
CVE-2026-7073 — A flaw has been found in itsourcecode Construction Management System 1.0. This affects an unknown part of the file /execute.php. This manipulation of...
CVE-2026-7072: CodePanda Source Canteen Management System SQLi
CVE-2026-7072 — A vulnerability was detected in CodePanda Source canteen_management_system 1.0. Affected by this issue is some unknown functionality of the file /api/login.php. The manipulation...
CVE-2026-7071 — CodeAstro Online Job Portal Vulnerability
CVE-2026-7071 — A security vulnerability has been detected in CodeAstro Online Job Portal 1.0. Affected by this vulnerability is an unknown functionality of the file...