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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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-29 | Updated 2026-03-30 | Assigner VulDB




HIGH: 8.7CVSS: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
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.8CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.0AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

1.00.33
affected

Timeline

2026-03-27:Advisory disclosed
2026-03-27:VulDB entry created
2026-03-27:VulDB entry last update

Credits

LtzHuster2 (VulDB User) reporter

VulDB coordinator

References

vuldb.com/vuln/353965 (VDB-353965 | Belkin F9K1122 Parameter formCrossBandSwitch stack-based overflow) vdb-entry technical-description

vuldb.com/vuln/353965/cti (VDB-353965 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/779123 (Submit #779123 | Belkin F9K1122 1.00.33 Stack-based Buffer Overflow) third-party-advisory

github.com/...heng/vul_db/blob/main/Belkin/vul_153/README.md exploit

cve.org (CVE-2026-5042)

nvd.nist.gov (CVE-2026-5042)

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