CVE-2026-5614
Published: 06 April 2026
Summary
CVE-2026-5614 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Belkin F9K1015 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Implements input validation on the 'webpage' argument in formSetPassword to prevent stack-based buffer overflows from malformed inputs.
Deploys memory protection mechanisms such as stack canaries or address space layout randomization to mitigate exploitation of the stack-based buffer overflow.
Establishes processes for timely flaw remediation, including applying vendor patches or replacing vulnerable firmware when available for this unpatched router vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The remote stack-based buffer overflow in the public-facing web form (/goform/formSetPassword) on the router directly enables exploitation of a public-facing application for initial access and remote code execution.
NVD Description
A security flaw has been discovered in Belkin F9K1015 1.00.10. Impacted is the function formSetPassword of the file /goform/formSetPassword. The manipulation of the argument webpage results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been…
more
released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-5614 is a stack-based buffer overflow vulnerability affecting the Belkin F9K1015 router on firmware version 1.00.10. The issue lies in the formSetPassword function within the /goform/formSetPassword file, where manipulation of the "webpage" argument triggers the overflow.
The vulnerability enables remote exploitation by attackers with low privileges (PR:L), requiring low attack complexity (AC:L) and no user interaction (UI:N). Successful attacks can result in high impacts to confidentiality, integrity, and availability (C:H/I:H/A:H), earning a CVSS v3.1 base score of 8.8. It maps to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow). A public exploit has been released.
Advisories from VulDB indicate the vendor was contacted early regarding disclosure but provided no response. No patches or official mitigations are available, with references pointing to VulDB vulnerability details and a GitHub repository hosting exploit information.
The exploit's public release increases the risk of active attacks against unpatched devices.
Details
- CWE(s)