Is CVE-2026-7101 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7101 being exploited in the wild.

How severe is CVE-2026-7101?

High severity, with a CVSS score of 8.8, published 27 April 2026.

Is there a fix for CVE-2026-7101?

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-2026-7101 attacked?

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

Am I affected by CVE-2026-7101?

Check whether you run Tenda F456 or Tenda F456 Firmware 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-2026-7101: Tenda F456 buffer overflow in fromWrlclientSet

CVE-2026-7101 · Severity: high · CVSS 8.8 · Published 2026-04-27

A security vulnerability exists in the Tenda F456 router, a device used to provide wireless internet connectivity. An attacker can exploit this flaw by sending a specially crafted web request to the device's management interface. If successful, this could allow the attacker to crash the router, causing a service outage, or potentially take full control of the device to monitor or redirect network traffic.

Technologies: Tenda F456, Tenda F456 Firmware. Vendors: Tenda.

Quick answers

Is CVE-2026-7101 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7101 being exploited in the wild.
How severe is CVE-2026-7101?: High severity, with a CVSS score of 8.8, published 27 April 2026.
Which products and versions are affected?: Tenda F456 1.0.0.5.
Is there a fix for CVE-2026-7101?: 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-2026-7101 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-7101?: Check whether you run Tenda F456 or Tenda F456 Firmware 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 vulnerability exists in the 'httpd' component of Tenda F456 firmware version 1.0.0.5. The flaw is located within the 'fromWrlclientSet' function in the '/goform/WrlclientSet' file. The vulnerability is triggered when the function processes the user-provided 'GO' parameter; it fails to perform adequate length checks before passing the data to 'sprintf' within the 'ask_to_reboot' function. An authenticated remote attacker can exploit this by sending a POST request with an oversized 'GO' parameter, leading to a buffer overflow of the 's_1' stack buffer. This can result in a denial of service (DoS) or remote code execution (RCE). Public exploit code (PoC) has been disclosed.

Affected products

Tenda F456 1.0.0.5

Timeline

2026-04-27: disclosed: Vulnerability disclosed and assigned CVE-2026-7101
2026-04-27: advisory

References

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