CVE-2026-7032: Tenda F456 Router Buffer Overflow Exploited Remotely
The National Vulnerability Database has disclosed CVE-2026-7032, a critical buffer overflow vulnerability in Tenda F456 router firmware version 1.0.0.5. The flaw resides in the SafeEmailFilter function within the /goform/SafeEmailFilter file, specifically when handling the page argument. This isn’t theoretical; a public exploit exists, confirming its weaponization potential.
Rated with a CVSSv3.1 score of 8.8 (High), this vulnerability is remotely exploitable without requiring user interaction beyond authenticated access. An attacker can leverage this to achieve high impact on confidentiality, integrity, and availability. The attack vector is network-based, meaning it can be initiated from anywhere with network access to the device.
For defenders, this is a clear call to action: if you’re running Tenda F456 routers, especially in exposed environments, they are a high-value target. Attackers don’t need zero-days when unpatched vulnerabilities with public exploits are available. This is low-hanging fruit for initial access, potentially leading to network compromise or device hijacking.
What This Means For You
- If your organization uses Tenda F456 routers, particularly version 1.0.0.5, you are exposed to a remotely exploitable buffer overflow (CVE-2026-7032). Given the public exploit, assume active targeting. Immediately identify and isolate these devices, or replace them if no patch is available. 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.
CVE-2026-7032: Tenda F456 Router SafeEmailFilter Buffer Overflow
title: CVE-2026-7032: Tenda F456 Router SafeEmailFilter Buffer Overflow
id: scw-2026-04-26-ai-1
status: experimental
level: critical
description: |
Detects the specific URI path and query parameter used in the remote buffer overflow exploit for Tenda F456 routers (CVE-2026-7032). The vulnerability lies in the SafeEmailFilter function, where manipulation of the 'page' argument leads to a buffer overflow. This rule specifically looks for POST requests to '/goform/SafeEmailFilter' with a 'page=' parameter, indicating a potential exploit attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-04-26
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7032/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/goform/SafeEmailFilter'
cs-uri-query|contains:
- 'page='
cs-method:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7032 | Buffer Overflow | Tenda F456 version 1.0.0.5 |
| CVE-2026-7032 | Buffer Overflow | Vulnerable function: SafeEmailFilter in /goform/SafeEmailFilter |
| CVE-2026-7032 | Buffer Overflow | Vulnerable argument: page in SafeEmailFilter |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 26, 2026 at 14:16 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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