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CVE-2026-5043— Belkin F9K1122 Parameter formSetPassword stack-based overflow

Quick assessment

Affected
Belkin F9K1122
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Belkin F9K1122是加拿大Belkin公司的一款WiFi信号扩展器。 Belkin F9K1122 1.00.33版本存在安全漏洞，该漏洞源于对文件/goform/formSetPassword中参数webpage的操作不当，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 1.06% · P63
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I. Basic Information for CVE-2026-5043

Vulnerability Information
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Vulnerability Title
Belkin F9K1122 Parameter formSetPassword stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in Belkin F9K1122 1.00.33. The impacted element is the function formSetPassword of the file /goform/formSetPassword of the component Parameter Handler. This manipulation of the argument webpage causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Belkin F9K1122 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Belkin F9K1122是加拿大Belkin公司的一款WiFi信号扩展器。 Belkin F9K1122 1.00.33版本存在安全漏洞，该漏洞源于对文件/goform/formSetPassword中参数webpage的操作不当，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Belkin F9K1122 1.00.33 cpe:2.3:o:belkin:f9k1122_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5043

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6901 chars
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III. Intelligence Information for CVE-2026-5043

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Vendor Advisories for CVE-2026-5043 (2)

Other References for CVE-2026-5043 (1)

Same Patch Batch · Belkin · 2026-03-29 · 3 CVEs total

CVE-2026-5042 8.8 HIGH Belkin F9K1122 Parameter formCrossBandSwitch stack-based overflow
CVE-2026-5044 8.8 HIGH Belkin F9K1122 Setting formSetSystemSettings stack-based overflow

IV. Related Vulnerabilities

Same product: F9K1122
Same vendor: Belkin
Same weakness: CWE-121

V. Comments for CVE-2026-5043

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