CVE-2026-9533: Totolink CA750-PoE Setting cstecgi.cgi recvUpgradeNewFw os command injection

Published May 26, 2026

Updated

A vulnerability was detected in Totolink CA750-PoE 6.2c.510. The impacted element is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. Performing a manipulation of the argument fwUrl/magicid results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Affected Software

1 affected component

TOTOLINK CA750-PoE=6.2c.510

Event History

May 26, 2026

CVE Published

via MITRE·05:15 AM

Data Sourced

via MITRE·05:15 AM

DescriptionSeverityWeakness

Data Sourced

via NVD·07:16 AM

DescriptionSeverityWeakness

Sep 24, 58369

Event

via NVD·08:58 PM

Frequently Asked Questions

What is the severity of CVE-2026-9533?

CVE-2026-9533 has a medium severity rating of 6.3.

How do I fix CVE-2026-9533?

To mitigate CVE-2026-9533, update the Totolink CA750-PoE firmware to the latest version that addresses this vulnerability.

What type of vulnerability is CVE-2026-9533?

CVE-2026-9533 is an OS command injection vulnerability.

What component is affected by CVE-2026-9533?

CVE-2026-9533 affects the Setting Handler function recvUpgradeNewFw in the cstecgi.cgi file.

Can CVE-2026-9533 be exploited remotely?

Yes, CVE-2026-9533 can be exploited remotely due to its nature of command injection.

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