Buffer Overflow Vulnerability in TOTOLINK A702R HTTP POST Request Handler
CVE-2025-6627

8.7HIGH

Key Information:

Vendor

Totolink
Status
A702r
Vendor
CVE Published:
25 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6627?

A buffer overflow vulnerability exists in the TOTOLINK A702R router's HTTP POST request handler, specifically in the '/boafrm/formIpv6Setup' component. The vulnerability arises due to improper handling of the 'submit-url' argument, allowing attackers to manipulate it and potentially execute arbitrary code remotely. This situation poses a serious threat as it can be exploited without physical access to the device, increasing the risk of unauthorized control over the affected systems.

Affected Version(s)

A702R 4.0.0-B20230721.1521

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-2025-6627 - Proof of Concept

References

https://vuldb.com/?id.313852
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313852
signaturepermissions-required
https://vuldb.com/?submit.602292
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-2025-6627 : Buffer Overflow Vulnerability in TOTOLINK A702R HTTP POST Request Handler