Buffer overflow in Belkin F9k1122
CVE-2026-4566
A flaw has been found in Belkin F9K1122 1.00.33. The affected element is the function formWISP5G of the file /goform/formWISP5G. Executing a manipulation of the argument webpage can lead to stack-based buffer overflow. The attack can be la…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (31.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Belkin F9k1122 — versions 1.00.33
- Belkin F9k1122_firmware — versions 1.00.33
Weakness classification (CWE)
References
- VDB-352403 | Belkin F9K1122 formWISP5G stack-based overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-352403 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #775132 | Belkin F9K1122 1.00.33 Stack-based Buffer Overflow (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (related, Exploit, Third Party Advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-4566?
- CVE-2026-4566 is a high-severity vulnerability in Belkin F9k1122, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-23.
- How severe is CVE-2026-4566?
- High severity. CVSS v3 base score is 8.8 out of 10.