---
id: "CVE-2026-114382"
kind: "vulnerability"
aliases: ["CVE-2026-114382"]
title: "TOTOLINK EX200 extender: remote stack overflow in DHCP config lets attackers run code"
severity: "critical"
cvss: 10.0
epss: 0.00667
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "TOTOLINK EX200 firmware", "fixed": [], "affected": "5.2.3c.7200", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["embedded", "ex200", "infrastructure", "totolink", "wifi-extender"]
not_affected_if: ["different-firmware-version", "no-remote-admin-exposure"]
published_at: "2026-10-21T22:16:48+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-24T13:15:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114382", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T22:26:20+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114382", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# TOTOLINK EX200 extender: remote stack overflow in DHCP config lets attackers run code

The TOTOLINK EX200 Wi-Fi extender firmware version 5.2.3c.7200 has a stack-based buffer overflow in the setStaticDhcpConfig function of its web CGI handler, triggered by the Comment argument. A remote attacker can send a crafted request to overwrite memory on the device, and a public exploit has been released.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:TOTOLINK EX200 firmware affected 5.2.3c.7200 fixed ?

## How to check

Check the firmware version under the device admin page or its system info; unknown whether the sources give a shell command.
Confirm whether the web management interface is reachable from the internet or untrusted networks.

## Fix

If no fix exists, restrict or disable remote access to the device's web interface.

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114382
- 2026-10-23T22:26:20+00:00 analyst — VulDB VDB-424741 (submitter zeroxf): unauthenticated remote, PoC public on GitHub (link not shown publicly, not found by me), no vendor fix or mitigation known; no TOTOLINK advisory found. Not verified: WAN exposure default. Sibling: CVE-2026-114383 (setWiFiAclAddConfig, same firmware).
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114382

## Documents

- [advisory] VDB-424741 TOTOLINK EX200 setStaticDhcpConfig overflow https://vuldb.com/vuln/424741

## From the sources

A security flaw has been discovered in TOTOLINK EX200 5.2.3c.7200. This affects the function setStaticDhcpConfig of the file /cgi-bin/cstecgi.cgi of the component lan.so. The manipulation of the argument Comment results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_