Command Injection Vulnerability in Totolink A3600R Router
CVE-2026-5020

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A3600r
Vendor
CVE Published:
29 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5020?

A command injection vulnerability exists in the Totolink A3600R router due to improper handling of the NoticeUrl argument in the setNoticeCfg function within the /cgi-bin/cstecgi.cgi component. This flaw allows an attacker to execute arbitrary commands on the device remotely, potentially compromising network security. The exploit has been publicly disclosed, highlighting the urgency for users to secure their devices against malicious exploitation.

Affected Version(s)

A3600R 4.1.2cu.5182_B20201102

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-2026-5020 - Proof of Concept

References

https://vuldb.com/vuln/353905
vdb-entrytechnical-description
https://vuldb.com/vuln/353905/cti
signaturepermissions-required
https://vuldb.com/submit/779536
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
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

wxhwxhwxh_mie (VulDB User)
.