Buffer Overflow Vulnerability in TOTOLINK EX1200T Router
CVE-2025-5909

8.7HIGH

Key Information:

Vendor

Totolink
Status
Ex1200t
Vendor
CVE Published:
10 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5909?

A significant vulnerability in the TOTOLINK EX1200T router allows for a buffer overflow through the HTTP POST request handler located at /boafrm/formReflashClientTbl. This weakness can be exploited remotely, enabling an attacker to manipulate the functionality without the need for local access. Public disclosure of this vulnerability heightens the risk of exploitation, making it essential for users to apply protective measures and ensure their devices are updated to mitigate potential attacks.

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-2025-5909 - Proof of Concept

References

https://vuldb.com/?id.311682
vdb-entry
https://vuldb.com/?ctiid.311682
signaturepermissions-required
https://vuldb.com/?submit.592270
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

wang_lun (VulDB User)
.
CVE-2025-5909 : Buffer Overflow Vulnerability in TOTOLINK EX1200T Router