CVE-2026-5105: Totolink A3300R Parameter cstecgi.cgi setVpnPassCfg command injection

Published Mar 30, 2026
·
Updated

A vulnerability was detected in Totolink A3300R 17.0.0cu.557b20221024. The affected element is the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument pptpPassThru results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Affected Software

3 affected components
TOTOLINK A3300R=17.0.0cu.557_b20221024
All of the following
TOTOLINK A3300R firmware=17.0.0cu.557_b20221024
TOTOLINK A3300R

Event History

Mar 30, 2026
CVE Published
via MITRE·03:00 AM
Data Sourced
via MITRE·03:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:16 AM
DescriptionSeverityWeaknessAffected Software
Feb 6, 58230
Event
via FIRST·06:20 AM
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Frequently Asked Questions

1

What is the severity of CVE-2026-5105?

CVE-2026-5105 has been classified with a high severity due to its command injection vulnerability.

2

How do I fix CVE-2026-5105?

To fix CVE-2026-5105, update the Totolink A3300R firmware to a version that addresses this vulnerability.

3

What affects the CVE-2026-5105 vulnerability?

CVE-2026-5105 affects the Totolink A3300R version 17.0.0cu.557_b20221024 specifically.

4

Who is affected by CVE-2026-5105?

Users of the Totolink A3300R router running the specified firmware version are affected by CVE-2026-5105.

5

What is the nature of the CVE-2026-5105 vulnerability?

CVE-2026-5105 is a command injection vulnerability that allows unauthorized commands to be executed via the setVpnPassCfg function.

Company

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