Buffer Overflow in TOTOLINK EX1200T HTTP POST Request Handler
CVE-2025-6568

8.7HIGH

Key Information:

Vendor

Totolink
Status
Ex1200t
Vendor
CVE Published:
24 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6568?

A buffer overflow vulnerability exists in the HTTP POST Request Handler of the TOTOLINK EX1200T router version 4.1.2cu.5232_B20210713. This issue arises specifically within the function handling the form submission for IPv6 setup, where improper validation of the 'submit-url' argument can be exploited remotely. Attackers may leverage this vulnerability to execute arbitrary code or crash the device, posing significant risks to the network security.

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-2025-6568 - Proof of Concept

References

https://vuldb.com/?id.313740
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313740
signaturepermissions-required
https://vuldb.com/?submit.601344
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

yuhongxiang (VulDB User)
.
CVE-2025-6568 : Buffer Overflow in TOTOLINK EX1200T HTTP POST Request Handler