Is CVE-2026-9515 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9515 being exploited in the wild.

How severe is CVE-2026-9515?

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

Is there a fix for CVE-2026-9515?

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-2026-9515 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-9515?

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-2026-9515: Totolink CA750-PoE command injection in setUnloadUserData

CVE-2026-9515 · Severity: medium · CVSS 6.3 · Published 2026-05-26

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

Technologies: TOTOLINK CA750-PoE. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-9515 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9515 being exploited in the wild.
How severe is CVE-2026-9515?: 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-2026-9515?: 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-2026-9515 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9515?: 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 'setUnloadUserData' function in the 'cstecgi.cgi' binary (specifically within the upgrade.so library). The 'plugin_version' parameter is improperly sanitized before being passed to a system shell, allowing an authenticated attacker to inject arbitrary commands using backticks or shell metacharacters. A public exploit exists demonstrating the ability to start a telnet daemon with root shell access. The attack is reachable over the network, though it typically requires low-level authentication.

Affected products

Totolink CA750-PoE 6.2c.510

Timeline

2026-05-26: advisory: NVD publication date

References

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