Buffer Overflow Vulnerability in TOTOLINK A702R Router
CVE-2025-6825

8.7HIGH

Key Information:

Vendor

Totolink
Status
A702r
Vendor
CVE Published:
28 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6825?

A vulnerability identified in the TOTOLINK A702R router's HTTP POST Request Handler allows an attacker to exploit the /boafrm/formWlSiteSurvey component. By manipulating the 'submit-url' argument, a buffer overflow can occur, which may lead to unauthorized access or control of the affected system. This vulnerability can be exploited remotely, emphasizing the need for immediate attention and patching by users of the affected version up to 4.0.0-B20230721.1521.

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-2025-6825 - Proof of Concept

References

https://vuldb.com/?id.314263
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314263
signaturepermissions-required
https://vuldb.com/?submit.602655
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

Ye Leipeng (VulDB User)
.
CVE-2025-6825 : Buffer Overflow Vulnerability in TOTOLINK A702R Router