Tenda HG10 Router Buffer Overflow (CVE-2026-6988) Exposes Remote Attack
The National Vulnerability Database has disclosed CVE-2026-6988, a high-severity buffer overflow vulnerability affecting Tenda HG10 HG7_HG9_HG10re_300001138_en_xpon routers. Specifically, the flaw resides in the formRoute function within the /boaform/formRouting component of the Boa Service. Manipulating the nextHop argument can trigger the overflow.
This vulnerability, with a CVSS v3.1 score of 8.8 (HIGH), is remotely exploitable, meaning attackers don’t need local network access to initiate an attack. The National Vulnerability Database states that an exploit has already been published, significantly increasing the immediate risk for affected users. This moves it from theoretical to actively weaponized, making patching critical.
Given that Tenda HG10 devices are typically deployed in home and small office environments, this exposure presents a direct path for attackers to gain control over network perimeters, potentially leading to broader network compromise, data exfiltration, or the establishment of persistent backdoors. Defenders must assume compromise if these devices are unpatched and internet-facing.
What This Means For You
- If your organization or remote workforce uses Tenda HG10 HG7_HG9_HG10re_300001138_en_xpon routers, you are directly exposed to a remotely exploitable, high-severity buffer overflow (CVE-2026-6988). Immediately identify these devices, isolate them from the internet if possible, and apply any available patches or vendor-recommended mitigations. Assume compromise if these devices have been internet-facing and unpatched.
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-2026-6988 Tenda HG10 Router formRouting Buffer Overflow
title: CVE-2026-6988 Tenda HG10 Router formRouting Buffer Overflow
id: scw-2026-04-25-ai-1
status: experimental
level: critical
description: |
This rule detects attempts to exploit CVE-2026-6988 by targeting the formRouting function in the Boa Service on Tenda HG10 routers. The exploit involves manipulating the 'nextHop' argument via a POST request to '/boaform/formRouting', triggering a buffer overflow. This detection focuses on the specific URI path and query parameter used in known exploit attempts.
author: SCW Feed Engine (AI-generated)
date: 2026-04-25
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-6988/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/boaform/formRouting'
cs-uri-query|contains:
- 'nextHop='
cs-method|contains:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6988 | Buffer Overflow | Tenda HG10 HG7_HG9_HG10re_300001138_en_xpon |
| CVE-2026-6988 | Buffer Overflow | Vulnerable component: Boa Service |
| CVE-2026-6988 | Buffer Overflow | Vulnerable file: /boaform/formRouting |
| CVE-2026-6988 | Buffer Overflow | Vulnerable function: formRoute |
| CVE-2026-6988 | Buffer Overflow | Manipulation of argument: nextHop |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 25, 2026 at 21:16 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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