# CVE-2026-5614: Belkin F9K1015 stack buffer overflow in formSetPassword

Source: https://junglewise.ai/threats/cve-2026-5614-belkin-f9k1015-stack-buffer-overflow-in-formsetpassword  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-06. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-5614 · Severity: high · CVSS 8.8 · Published 2026-04-06

A security vulnerability exists in the Belkin F9K1015 wireless router, a device used to provide internet connectivity in homes and small offices. An attacker could exploit this flaw to crash the router or potentially take full control of the device. This could lead to a total loss of internet access for the network or allow an attacker to intercept and manipulate network traffic.

Technologies: [Belkin F9k1015](https://junglewise.ai/threats/technologies/f9k1015), [Belkin F9k1015 Firmware](https://junglewise.ai/threats/technologies/f9k1015-firmware). Vendors: [Belkin](https://junglewise.ai/threats/vendors/belkin).

## Quick answers

**Is CVE-2026-5614 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5614 being exploited in the wild.

**How severe is CVE-2026-5614?** 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-2026-5614?** 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-2026-5614 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-5614?** 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 firmware version 1.00.10 within the 'webs' server component. The flaw is located in the 'formSetPassword' function in '/goform/formSetPassword', where the 'webpage' parameter is read and subsequently passed to a 'strcpy' call into the 'reboot_msg' buffer without 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 remote code execution (RCE) or a denial of service (DoS) condition. A public exploit (PoC) is available, and the vendor has reportedly not responded to disclosure attempts.

## Affected products

- Belkin F9K1015 1.00.10

## Timeline

- 2026-04-06: disclosed: Vulnerability disclosed and exploit released to the public.
- 2026-04-06: advisory: Initial advisory published by VulDB.

## References

- [https://github.com/Litengzheng/vuldb_new/blob/main/Belkin%20F9K1015/vul_11/README.md](https://github.com/Litengzheng/vuldb_new/blob/main/Belkin%20F9K1015/vul_11/README.md)
- [https://vuldb.com/submit/785554](https://vuldb.com/submit/785554)
- [https://vuldb.com/vuln/355405](https://vuldb.com/vuln/355405)
- [https://vuldb.com/vuln/355405/cti](https://vuldb.com/vuln/355405/cti)

## Related threats

- [Belkin F9K1015 stack-based buffer overflow in formSetFirewall](https://junglewise.ai/threats/cve-2026-5629-belkin-f9k1015-stack-based-buffer-overflow-in-formsetfirewall)
- [Belkin F9K1015 stack overflow in formSetSystemSettings](https://junglewise.ai/threats/cve-2026-5628-belkin-f9k1015-stack-overflow-in-formsetsystemsettings)
- [Belkin F9K1015 stack-based buffer overflow in formReboot](https://junglewise.ai/threats/cve-2026-5613-belkin-f9k1015-stack-based-buffer-overflow-in-formreboot)
- [Belkin F9K1015 stack buffer overflow in formWlEncrypt](https://junglewise.ai/threats/cve-2026-5612-belkin-f9k1015-stack-buffer-overflow-in-formwlencrypt)
- [Belkin F9K1015 stack-based buffer overflow in formCrossBandSwitch](https://junglewise.ai/threats/cve-2026-5611-belkin-f9k1015-stack-based-buffer-overflow-in-formcrossbandswitch)