Improper Access Control in TOTOLINK A720R Log Handler
CVE-2025-4269

6.9MEDIUM

Key Information:

Vendor
Totolink
Status
A720r
Vendor
CVE Published:
5 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The TOTOLINK A720R is affected by a significant vulnerability in its Log Handler component, specifically in the processing of the /cgi-bin/cstecgi.cgi file. The issue arises from inappropriate handling of input parameters, particularly the topicurl argument. By manipulating this parameter, attackers can gain unauthorized access to sensitive functionalities such as clearDiagnosisLog, clearSyslog, and clearTracerouteLog. This vulnerability allows potential attackers to execute commands and perform actions remotely, posing a serious risk to users and network security.

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-2025-4269 - Proof of Concept

References

https://vuldb.com/?id.307373
vdb-entrytechnical-description
https://vuldb.com/?ctiid.307373
signaturepermissions-required
https://vuldb.com/?submit.563430
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
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-2025-4269 : Improper Access Control in TOTOLINK A720R Log Handler | SecurityVulnerability.io