Command Injection Vulnerability in Totolink A3300R Router
CVE-2026-5176

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
A3300r
Vendor
CVE Published:
31 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5176?

A security flaw has been identified in the Totolink A3300R router, particularly within the setSyslogCfg function located in /cgi-bin/cstecgi.cgi. This vulnerability allows an attacker to perform command injection by manipulating input arguments, which can lead to unauthorized command execution remotely. Exploitation of this vulnerability poses significant risks, as it may allow attackers to gain unauthorized access to the system. The exploit has been publicly disclosed, enhancing its risk of being weaponized in attacks.

Affected Version(s)

A3300R 17.0.0cu.557_b20221024

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-2026-5176 - Proof of Concept

References

https://vuldb.com/vuln/354244
vdb-entrytechnical-description
https://vuldb.com/vuln/354244/cti
signaturepermissions-required
https://vuldb.com/submit/779145
third-party-advisory

CVSS V4

Score:
6.9
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

LvHW (VulDB User)
.