Is CVE-2026-5613 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5613 being exploited in the wild.

How severe is CVE-2026-5613?

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

Is there a fix for CVE-2026-5613?

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-2026-5613 attacked?

It is attacked over the network, in device firmware.

Am I affected by CVE-2026-5613?

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-2026-5613: Belkin F9K1015 stack-based buffer overflow in formReboot

CVE-2026-5613 · Severity: high · CVSS 8.8 · Published 2026-04-06

A security vulnerability exists in the Belkin F9K1015 wireless router that could allow an attacker to take control of the device. By sending a specially crafted request to the router's reboot function, an attacker can cause the system to crash or execute unauthorized commands. This could lead to a total loss of device availability, interception of network traffic, or unauthorized access to the home or office network.

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

Quick answers

Is CVE-2026-5613 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5613 being exploited in the wild.
How severe is CVE-2026-5613?: 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-2026-5613?: 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-2026-5613 attacked?: It is attacked over the network, in device firmware.
Am I affected by CVE-2026-5613?: 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 'formReboot' function within the '/goform/formReboot' component of Belkin F9K1015 firmware version 1.00.10. The issue stems from the unsafe use of the 'strcpy' function when processing the user-supplied 'webpage' argument, which lacks proper length validation before being copied into the 'ok_msg' buffer. A remote attacker with low privileges can exploit this by sending a malicious POST request containing an oversized string, leading to memory corruption. This can result in a denial of service (system crash) or potentially remote code execution (RCE). A public exploit (PoC) is available, and the vendor has reportedly not responded to disclosure attempts.

Affected products

Belkin F9K1015 1.00.10

Timeline

2026-04-05: disclosed: Vulnerability first reported by VulDB
2026-04-06: advisory: NVD publication date

References

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