Information Disclosure in TOTOLINK A720R Config Handler
CVE-2025-4270

6.9MEDIUM

Key Information:

Vendor
Totolink
Status
A720r
Vendor
CVE Published:
5 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A vulnerability exists in the TOTOLINK A720R, specifically within the Config Handler at /cgi-bin/cstecgi.cgi. This issue arises from improper handling of the 'topicurl' parameter during requests for getInitCfg and getSysStatusCfg, which can lead to exposure of sensitive system information. The flaw can be exploited remotely, potentially allowing unauthorized access to critical system details. This vulnerability has been publicly disclosed, highlighting its significance in the cybersecurity landscape.

Affected Version(s)

A720R 4.1.5cu.374

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-2025-4270 - Proof of Concept

References

https://vuldb.com/?id.307374
vdb-entrytechnical-description
https://vuldb.com/?ctiid.307374
signaturepermissions-required
https://vuldb.com/?submit.563442
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
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

153528990 (VulDB User)
.
CVE-2025-4270 : Information Disclosure in TOTOLINK A720R Config Handler | SecurityVulnerability.io