Is CVE-2026-104611 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104611 being exploited in the wild.

How severe is CVE-2026-104611?

Critical severity, with a CVSS score of 9.1, published 2 October 2026.

Which products and versions are affected?

Tenda Ac9 15.03.02.13 and likely other versions.

Is there a fix for CVE-2026-104611?

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-2026-104611 attacked?

It is attacked over the network, in device firmware.

Am I affected by CVE-2026-104611?

Check whether you run Tenda Ac9 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-2026-104611: Tenda AC9 stack buffer overflow in POST request handler

CVE-2026-104611 · Severity: critical · CVSS 9.1 · Published 2026-10-02

Tenda AC9 is a wireless router used in homes and small offices to provide internet connectivity. A vulnerability in its web-based settings interface allows an attacker on the network to send a specially crafted request that overwrites memory and executes arbitrary code, potentially giving them complete control of the router and access to all connected devices and network traffic.

Technologies: Tenda Ac9. Vendors: Tenda.

Quick answers

Is CVE-2026-104611 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104611 being exploited in the wild.
How severe is CVE-2026-104611?: Critical severity, with a CVSS score of 9.1, published 2 October 2026.
Which products and versions are affected?: Tenda Ac9 15.03.02.13 and likely other versions.
Is there a fix for CVE-2026-104611?: 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-2026-104611 attacked?: It is attacked over the network, in device firmware.
Am I affected by CVE-2026-104611?: Check whether you run Tenda Ac9 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

A stack-based buffer overflow exists in the /goform/fast_setting_internet_set endpoint of the Tenda AC9 firmware, triggered by manipulation of the netWanType parameter via POST request. The vulnerability allows unauthenticated remote code execution with no user interaction required. A public exploit is available, increasing the practical risk.

Affected products

Tenda AC9 15.03.02.13 and likely other versions

Timeline

2026-10-02: disclosed

References

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