Command Injection Vulnerability in Totolink A3300R Router
CVE-2026-5105

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A3300r
Vendor
CVE Published:
30 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5105?

A command injection vulnerability exists in the Totolink A3300R router, specifically affecting the setVpnPassCfg function in the cgi-bin/cstecgi.cgi file. An attacker can manipulate the pptpPassThru argument to execute arbitrary commands on the device. This vulnerability permits remote exploitation, raising significant security concerns for users of the affected firmware version.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

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-2026-5105 - Proof of Concept

References

https://vuldb.com/vuln/354130
vdb-entrytechnical-description
https://vuldb.com/vuln/354130/cti
signaturepermissions-required
https://vuldb.com/submit/779143
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
.