Is CVE-2026-5042 actively exploited?

CVE-2026-5042 has no public evidence of in-the-wild exploitation as of 2026-03-30.

What is the CVSS score for CVE-2026-5042?

CVE-2026-5042 has a CVSS score of 7.4 (HIGH severity). 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/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.

How do I patch CVE-2026-5042?

Patch guidance is available from belkin security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-5042.

Which products are affected by CVE-2026-5042?

1 product: belkin f9k1122 firmware.

Fix CVE-2026-5042 - HIGH belkin f9k1122 firmware

Description

A security flaw has been discovered in Belkin F9K1122 1.00.33. The affected element is the function formCrossBandSwitch of the file /goform/formCrossBandSwitch of the component Parameter Handler. The manipulation of the argument webpage results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been 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.

CVSS Metrics

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/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
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-119 · Memory Buffer Errors CWE-121 CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: BELKIN
Published: 3/29/2026
Last Modified: 3/30/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-5042

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary