CVE-2026-4566CWE-119CWE-121

Belkin F9K1122 formWISP5G stack-based overflow

High · published March 23, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
65.4
In the wild
Unconfirmed
What it is

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 launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.01099 · 65.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-03-23T01:30Z
EPSS history
Timeline
  • 23 MAR 01:30Z
    Belkin F9K1122 formWISP5G stack-based overflow
    cvelistv5