Is CVE-2026-9533 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9533 being exploited in the wild.

How severe is CVE-2026-9533?

Medium severity, with a CVSS score of 6.3, published 26 May 2026.

Is there a fix for CVE-2026-9533?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-9533 attacked?

It is attacked over the network, in device firmware.

Am I affected by CVE-2026-9533?

Check whether you run TOTOLINK CA750-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-9533: Totolink CA750-PoE command injection in recvUpgradeNewFw

CVE-2026-9533 · Severity: medium · CVSS 6.3 · Published 2026-05-26

A security vulnerability exists in the Totolink CA750-PoE router, a device used to provide wireless networking and Power-over-Ethernet capabilities. An attacker can exploit this flaw to take control of the device by executing unauthorized commands. This could lead to a complete compromise of the network traffic passing through the router or a disruption of internet services.

Technologies: TOTOLINK CA750-PoE. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-9533 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9533 being exploited in the wild.
How severe is CVE-2026-9533?: Medium severity, with a CVSS score of 6.3, published 26 May 2026.
Which products and versions are affected?: TOTOLINK CA750-PoE 6.2c.510.
Is there a fix for CVE-2026-9533?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-9533 attacked?: It is attacked over the network, in device firmware.
Am I affected by CVE-2026-9533?: Check whether you run TOTOLINK CA750-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability exists in the Totolink CA750-PoE router running firmware version 6.2c.510. The flaw is located within the 'recvUpgradeNewFw' function in the '/cgi-bin/cstecgi.cgi' component (Setting Handler). The vulnerability stems from improper neutralization of special elements in the 'fwUrl' and 'magicid' parameters, which are passed directly to a system shell. A remote attacker with low privileges can exploit this by sending a crafted POST request containing shell metacharacters (e.g., backticks) to execute arbitrary commands on the underlying Linux operating system. A public exploit demonstrating a telnet reverse shell is available.

Affected products

Totolink CA750-PoE 6.2c.510

Timeline

2026-05-26: disclosed: Vulnerability disclosed via VulDB and GitHub PoC
2026-05-26: advisory: CVE-2026-9533 published

References

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