CVE-2026-5042 Details
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.
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 'formCrossBandSwitch' function within the '/goform/formCrossBandSwitch' file, part of the Parameter Handler component. The vulnerability is triggered by manipulating the 'webpage' argument, which is not properly validated before being copied to a stack-based 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 30, 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_153/README.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/779123 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/353965 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/353965/cti | [email protected] | Permissions RequiredVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| 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 |
| Mar 30, 2026 | Initial Analysis | [email protected] |
| Mar 29, 2026 | New CVE Received | [email protected] |