CVE-2026-4566

Name: CVE-2026-4566
Creator: NVD / NIST
Published: 2026-03-23T03:16:00.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2026-4566 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A flaw has been found in Belkin F9K1122 1.00.33. The affected element is the function formWISP5G of the file /goform/formWISP5G. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Belkin	F9k1122 Firmware	1.00.33

References

https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_151/README.mdExploit, Third Party Advisory
https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_151/README.md#proof-of-concept-pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.352403Permissions Required, VDB Entry
https://vuldb.com/?id.352403Third Party Advisory, VDB Entry
https://vuldb.com/?submit.775132Third Party Advisory, VDB Entry

Timeline

Published: Mar 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4566?

How severe is CVE-2026-4566?

CVE-2026-4566 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4566?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4566?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST