Tenda F456 Router: Critical Buffer Overflow (CVE-2026-7081) Puts Networks at Risk
The National Vulnerability Database has disclosed a critical buffer overflow vulnerability, CVE-2026-7081, impacting Tenda F456 1.0.0.5 routers. The flaw resides in the fromGstDhcpSetSer function within the /goform/GstDhcpSetSer component of the httpd service. This vulnerability is triggered by manipulating the dips argument, leading to a buffer overflow.
Rated with a CVSSv3.1 score of 8.8 (High), this vulnerability allows for remote exploitation. The National Vulnerability Database confirms that an exploit for CVE-2026-7081 is publicly available, significantly increasing the immediate threat level. Attackers can leverage this to gain control over affected devices, potentially leading to network compromise, data exfiltration, or further lateral movement within an organization’s infrastructure.
For defenders, the implications are severe. Exposed Tenda F456 routers are now prime targets. The public availability of an exploit means that even unsophisticated actors can weaponize this vulnerability. Prioritize identifying and isolating any Tenda F456 1.0.0.5 devices on your network immediately. If a patch is not available, remove these devices from internet-facing positions or replace them entirely.
What This Means For You
- If your organization uses Tenda F456 1.0.0.5 routers, you are directly exposed to a critical, remotely exploitable vulnerability (CVE-2026-7081) with a public exploit. Immediately identify these devices and either apply available patches or remove them from your network's perimeter. Assume compromise if these devices are internet-facing and unpatched; initiate incident response protocols.
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-2026-7081 Tenda F456 Router Buffer Overflow via GstDhcpSetSer
title: CVE-2026-7081 Tenda F456 Router Buffer Overflow via GstDhcpSetSer
id: scw-2026-04-27-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit CVE-2026-7081 by targeting the /goform/GstDhcpSetSer endpoint with a POST request containing the 'dips' parameter, which is known to trigger a buffer overflow vulnerability in Tenda F456 routers.
author: SCW Feed Engine (AI-generated)
date: 2026-04-27
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7081/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/goform/GstDhcpSetSer'
cs-uri-query|contains:
- 'dips='
cs-method|exact:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7081 | Buffer Overflow | Tenda F456 version 1.0.0.5 |
| CVE-2026-7081 | Buffer Overflow | Vulnerable function: fromGstDhcpSetSer |
| CVE-2026-7081 | Buffer Overflow | Vulnerable file/endpoint: /goform/GstDhcpSetSer |
| CVE-2026-7081 | Buffer Overflow | Vulnerable component: httpd |
| CVE-2026-7081 | Buffer Overflow | Argument 'dips' manipulation |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 27, 2026 at 07:16 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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