Description
A vulnerability was detected in Belkin F9K1015 1.00.10. The affected element is the function formSetFirewall of the file /goform/formSetFirewall. The manipulation of the argument webpage results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Published: 2026-04-06
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

A stack‑based buffer overflow exists in the formSetFirewall routine of the Belkin F9K1015 firmware 1.00.10. Manipulation of the webpage argument can corrupt the stack and lead to arbitrary code execution or an application crash. The vulnerability can be triggered from outside the device over the network, exposing the system to full compromise of confidentiality, integrity, and availability.

Affected Systems

The affected product is the Belkin F9K1015 router running firmware 1.00.10. No other versions are listed, so only this build is confirmed vulnerable.

Risk and Exploitability

The CVSS score of 8.7 classifies the issue as high severity. The publicly available exploit demonstrates that attackers can remotely trigger the overflow without prerequisites. While no EPSS score is provided and the vulnerability is not listed in CISA’s KEV catalog, the remote execution vector and high severity warrant urgent attention.

Generated by OpenCVE AI on April 6, 2026 at 09:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply a vendor‑supplied firmware patch or update to a version where formSetFirewall is fixed.
  • If a patch is not immediately available, block or restrict access to the /goform/formSetFirewall endpoint using an external firewall or ACL.
  • Monitor network traffic for unusual POST or GET requests targeting /goform/formSetFirewall.
  • Verify firmware version after update to confirm the vulnerability is mitigated.
  • Maintain up‑to‑date documentation of device configurations to enable rapid recovery in case of compromise.

Generated by OpenCVE AI on April 6, 2026 at 09:20 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 07 Apr 2026 07:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 07 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Belkin f9k1015
Vendors & Products Belkin f9k1015

Mon, 06 Apr 2026 06:45:00 +0000

Type Values Removed Values Added
Description A vulnerability was detected in Belkin F9K1015 1.00.10. The affected element is the function formSetFirewall of the file /goform/formSetFirewall. The manipulation of the argument webpage results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Title Belkin F9K1015 formSetFirewall stack-based overflow
First Time appeared Belkin
Belkin f9k1015 Firmware
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:o:belkin:f9k1015_firmware:*:*:*:*:*:*:*:*
Vendors & Products Belkin
Belkin f9k1015 Firmware
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}

Subscriptions

Belkin F9k1015 F9k1015 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-04-07T03:02:58.122Z

Reserved: 2026-04-05T19:04:48.555Z

Link: CVE-2026-5629

cve-icon Vulnrichment

Updated: 2026-04-07T03:02:53.775Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-06T06:16:22.310

Modified: 2026-04-07T13:20:35.010

Link: CVE-2026-5629

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-06T21:47:20Z

Weaknesses