Command Injection Vulnerability in Totolink A3300R Router
CVE-2026-5104

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A3300r
Vendor
CVE Published:
30 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5104?

A security vulnerability has been identified in the Totolink A3300R router, specifically in the setStaticRoute function located within the /cgi-bin/cstecgi.cgi file. An attacker can manipulate the IP argument, allowing for command injection from a remote location. This vulnerability poses a significant risk, as it can potentially allow unauthorized access and control over the affected device. The exploit has been publicly disclosed, emphasizing the urgency for users to secure their devices against potential attacks.

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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-2026-5104 - Proof of Concept

References

https://vuldb.com/vuln/354129
vdb-entrytechnical-description
https://vuldb.com/vuln/354129/cti
signaturepermissions-required
https://vuldb.com/submit/779142
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

LvHW (VulDB User)
JSON
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