Stack-Based Buffer Overflow in TOTOLINK EX200 Network Device
CVE-2026-114382

10CRITICAL

Key Information:

Vendor

Totolink
Status
Ex200
Vendor
CVE Published:
21 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-114382?

A security flaw has been identified in the TOTOLINK EX200 router, specifically affecting version 5.2.3c.7200. The vulnerability resides within the setStaticDhcpConfig function found in the /cgi-bin/cstecgi.cgi component of the lan.so file. This issue allows for a stack-based buffer overflow due to improper handling of the Comment argument. Attackers can exploit this vulnerability remotely, which poses a significant risk as exploitation methods have already been released publicly. Users of the TOTOLINK EX200 should take immediate precautions to safeguard their devices.

Affected Version(s)

EX200 5.2.3c.7200

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-114382 - Proof of Concept

References

https://vuldb.com/vuln/424741
vdb-entrytechnical-description
https://vuldb.com/vuln/424741/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-114382
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

zeroxf (VulDB User)
.