Stack-based Buffer Overflow in TOTOLINK EX1200T Router
CVE-2025-6302

8.7HIGH

Key Information:

Vendor

Totolink
Status
Ex1200t
Vendor
CVE Published:
20 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6302?

A stack-based buffer overflow vulnerability exists in the TOTOLINK EX1200T router, specifically within the function setStaticDhcpConfig located in the /cgi-bin/cstecgi.cgi file. This vulnerability is triggered by improper handling of the 'Comment' argument, allowing an attacker to execute arbitrary code remotely. The exploit has been publicly disclosed, increasing the risk of attacks on affected devices. Users are strongly advised to apply security patches or take necessary mitigation measures to protect their devices from 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-2025-6302 - Proof of Concept

References

https://vuldb.com/?id.313302
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313302
signaturepermissions-required
https://vuldb.com/?submit.595473
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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

orea (VulDB User)
.
CVE-2025-6302 : Stack-based Buffer Overflow in TOTOLINK EX1200T Router