Is CVE-2026-5610 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5610 being exploited in the wild.

How severe is CVE-2026-5610?

High severity, with a CVSS score of 8.8, published 6 April 2026.

Is there a fix for CVE-2026-5610?

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-2026-5610 attacked?

It is attacked over the network, in device firmware.

Am I affected by CVE-2026-5610?

Check whether you run Belkin F9k1015 or Belkin F9k1015 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-2026-5610: Belkin F9K1015 stack-based buffer overflow in formWISP5G

CVE-2026-5610 · Severity: high · CVSS 8.8 · Published 2026-04-06

A security vulnerability has been identified in the Belkin F9K1015 wireless router. This device is used to provide internet connectivity and manage local network traffic for home and small office environments. An attacker could exploit this flaw to crash the router or potentially take full control of the device, which could lead to the interception of network traffic or unauthorized access to the local network.

Technologies: Belkin F9k1015, Belkin F9k1015 Firmware. Vendors: Belkin.

Quick answers

Is CVE-2026-5610 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5610 being exploited in the wild.
How severe is CVE-2026-5610?: High severity, with a CVSS score of 8.8, published 6 April 2026.
Which products and versions are affected?: Belkin F9k1015 1.00.10.
Is there a fix for CVE-2026-5610?: 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-2026-5610 attacked?: It is attacked over the network, in device firmware.
Am I affected by CVE-2026-5610?: Check whether you run Belkin F9k1015 or Belkin F9k1015 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 Belkin F9K1015 router firmware version 1.00.10. The flaw is located within the 'formWISP5G' function in the '/goform/formWISP5G' component. The vulnerability is triggered when the 'webpage' parameter is processed; the application uses the 'strcpy' function to copy user-supplied data into a stack buffer without performing adequate length validation. A remote attacker with low privileges can exploit this by sending a specially crafted POST request containing an oversized 'webpage' argument. Successful exploitation can lead to arbitrary code execution or a denial-of-service (DoS) condition. As of the advisory date, the vendor has not responded to disclosure attempts.

Affected products

Belkin F9K1015 1.00.10

Timeline

2026-04-06: disclosed: Public disclosure of the exploit and vulnerability details.
2026-04-06: advisory

References

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