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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.

PUBLISHED Reserved 2026-03-22 | Published 2026-03-23 | Updated 2026-03-23 | 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

2026-03-22:Advisory disclosed
2026-03-22:VulDB entry created
2026-03-22:VulDB entry last update

Credits

LtzHust (VulDB User) reporter

VulDB coordinator

References

vuldb.com/?id.352403 (VDB-352403 | Belkin F9K1122 formWISP5G stack-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.352403 (VDB-352403 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.775132 (Submit #775132 | Belkin F9K1122 1.00.33 Stack-based Buffer Overflow) third-party-advisory

github.com/...heng/vul_db/blob/main/Belkin/vul_151/README.md related

github.com/...heng/vul_db/blob/main/Belkin/vul_151/README.md exploit

cve.org (CVE-2026-4566)

nvd.nist.gov (CVE-2026-4566)

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