CVE-2026-4566 Details
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.
A stack-based buffer overflow vulnerability has been identified in the Belkin F9K1122 router, specifically in version 1.00.33. The issue arises in the 'formWISP5G' function within the '/goform/formWISP5G' file, where the 'webpage' parameter is not properly validated before being copied to a buffer. This flaw can be exploited remotely, potentially leading to unauthorized code execution or a denial-of-service condition.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_151/README.md | [email protected] | ExploitThird Party Advisory |
| https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_151/README.md#proof-of-concept-poc | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.352403 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.352403 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.775132 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| belkin f9k1122 firmware | 1.00.33 |
CPE
Remediation
| |
| belkin f9k1122 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Mar 23, 2026 | New CVE Received | [email protected] |