Remote Stack-Based Buffer Overflow in TOTOLINK Networking Device
CVE-2025-5600

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
Ex1200t
Vendor
CVE Published:
4 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5600?

A remote exploitable stack-based buffer overflow has been identified in the TOTOLINK EX1200T 4.1.2cu.5232_B20210713 networking device. This vulnerability resides in the 'setLanguageCfg' function of the '/cgi-bin/cstecgi.cgi' file, where improper handling of the LangType argument can lead to critical memory corruption. Attackers can exploit this issue from remote locations, potentially allowing them to execute arbitrary code or disrupt services. It is crucial for administrators to apply security updates and monitor for unusual activities on affected devices to prevent potential exploitation.

Affected Version(s)

EX1200T 4.1.2cu.5232_B20210713

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-2025-5600 - Proof of Concept

References

https://vuldb.com/?id.311087
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311087
signaturepermissions-required
https://vuldb.com/?submit.588075
third-party-advisory

CVSS V4

Score:
9.3
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

asonepen (VulDB User)
.
CVE-2025-5600 : Remote Stack-Based Buffer Overflow in TOTOLINK Networking Device