CVE-2026-5042 | Belkin F9K1122 1.00.33 Parameter formCrossBandSwitch webpage stack-based overflow

VDB-353965 · CVE-2026-5042 · GCVE-100-353965 BELKIN F9K1122 1.00.33 PARAMETER FORMCROSSBANDSWITCH WEBPAGE STACK-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.0 $0-$5k 1.60+ Summaryinfo A vulnerability has been found in Belkin F9K1122 1.00.33 and classified as critical. The impacted element is the function formCrossBandSwitch of the file /goform/formCrossBandSwitch of the component Parameter Handler. This manipulation of the argument webpage causes stack-based overflow. This vulnerability is registered as CVE-2026-5042. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability has been found in Belkin F9K1122 1.00.33 and classified as critical. Affected by this vulnerability is the function formCrossBandSwitch of the file /goform/formCrossBandSwitch of the component Parameter Handler. The manipulation of the argument webpage with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The advisory is shared at github.com. This vulnerability is known as CVE-2026-5042. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor Belkin Name F9K1122 Version 1.00.33 License commercial CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.8 VulDB Meta Temp Score: 8.0 VulDB Base Score: 8.8 VulDB Temp Score: 8.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Stack-based overflow CWE: CWE-121 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/27/2026 Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Not defined CVE: CVE-2026-5042 (🔒) GCVE (CVE): GCVE-0-2026-5042 GCVE (VulDB): GCVE-100-353965 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/27/2026 17:41 Changes: 03/27/2026 17:41 (58) Complete: 🔍 Submitter: LtzHuster2 Cache ID: 99:CAD:101 Submitinfo Accepted Submit #779123: Belkin F9K1122 1.00.33 Stack-based Buffer Overflow (by LtzHuster2) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸