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TI-2026-04400 Aliases CVE-2026-5042GHSA-h7qj-64j4-6grw

Belkin F9K1122 Parameter formCrossBandSwitch stack-based overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00699 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
BelkinF9K11221.00.33—No fix listedCNA
  • F9K1122 VendorBelkin Affected 1.00.33 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:belkin:f9k1122_firmware:1.00.33:*:*:*:*:*:*:*1.00.33VulnerableBelkin
cpe:2.3:h:belkin:f9k1122:-:*:*:*:*:*:*:*not specified by NVDRunning onBelkin
  • cpe:2.3:o:belkin:f9k1122_firmware:1.00.33:*:*:*:*:*:*:* Versions 1.00.33 Vulnerable ·Belkin
  • cpe:2.3:h:belkin:f9k1122:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Belkin

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5042
  2. 2026-10-03 Alias added: GHSA-h7qj-64j4-6grw

References

Exploit 1

  • TI-2026-04916 Belkin F9K1122 formWlanSetup stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-04402 Belkin F9K1122 Setting formSetSystemSettings stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-04401 Belkin F9K1122 Parameter formSetPassword stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-03970 Belkin F9K1122 formWISP5G stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-06456 Belkin F9K1122 webs formBSSetSitesurvey stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-06455 Belkin F9K1122 webs formSetLanguage stack-based overflow CVSS 4.0HIGH 8.7
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences