Buffer Overflow in TOTOLINK A3002RU HTTP POST Request Handler
CVE-2025-6939

8.7HIGH

Key Information:

Vendor

Totolink
Status
A3002ru
Vendor
CVE Published:
1 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6939?

A buffer overflow vulnerability has been identified in the TOTOLINK A3002RU router, specifically within the HTTP POST Request Handler of the function located at /boafrm/formWlSiteSurvey. An attacker can exploit this vulnerability by sending specially crafted HTTP POST requests, resulting in the manipulation of the submit-url argument. Given that the attack can be executed remotely, this presents a significant security risk, as it could allow unauthorized access or control over the device. Public disclosure of this exploit not only raises awareness but also emphasizes the need for immediate action to secure affected devices.

Affected Version(s)

A3002RU 3.0.0-B20230809.1615

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-2025-6939 - Proof of Concept

References

https://vuldb.com/?id.314460
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314460
signaturepermissions-required
https://vuldb.com/?submit.605860
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-2025-6939 : Buffer Overflow in TOTOLINK A3002RU HTTP POST Request Handler