Overview
A critical vulnerability has been identified in the Belkin F9K1122 version 1.00.33. This vulnerability, tracked as CVE-2025-7091, can potentially lead to system compromise or data leakage. It impacts the function formWlanMP of the file /goform/formWlanMP of the component webs. This vulnerability matters because it can be exploited remotely, and the exploit details have been made public. Furthermore, the vendor has not responded to early disclosure, leaving the systems vulnerable.
Vulnerability Summary
CVE ID: CVE-2025-7091
Severity: Critical, with a CVSS score of 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
Belkin F9K1122 | 1.00.33
How the Exploit Works
The vulnerability exists due to a stack-based buffer overflow within the function formWlanMP of the file /goform/formWlanMP. This overflow is triggered by manipulating inputs to a series of arguments. By sending a specially crafted input to these arguments, an attacker can cause the system to write data beyond the intended buffer space, potentially leading to system crashes or, more worryingly, allowing the execution of arbitrary code.
Conceptual Example Code
Below is a conceptual example of how this vulnerability might be exploited using a HTTP POST request with specifically crafted malicious data:
POST /goform/formWlanMP HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
ateFunc=OVERFLOW_DATA&ateGain=OVERFLOW_DATA&ateTxCount=OVERFLOW_DATA&ateChan=OVERFLOW_DATA&ateRate=OVERFLOW_DATA&ateMacID=OVERFLOW_DATA&e2pTxPower1=OVERFLOW_DATA&e2pTxPower2=OVERFLOW_DATA&e2pTxPower3=OVERFLOW_DATA&e2pTxPower4=OVERFLOW_DATA&e2pTxPower5=OVERFLOW_DATA&e2pTxPower6=OVERFLOW_DATA&e2pTxPower7=OVERFLOW_DATA&e2pTx2Power1=OVERFLOW_DATA&e2pTx2Power2=OVERFLOW_DATA&e2pTx2Power3=OVERFLOW_DATA&e2pTx2Power4=OVERFLOW_DATA&e2pTx2Power5=OVERFLOW_DATA&e2pTx2Power6=OVERFLOW_DATA&e2pTx2Power7=OVERFLOW_DATA&ateTxFreqOffset=OVERFLOW_DATA&ateMode=OVERFLOW_DATA&ateBW=OVERFLOW_DATA&ateAntenna=OVERFLOW_DATA&e2pTxFreqOffset=OVERFLOW_DATA&e2pTxPwDeltaB=OVERFLOW_DATA&e2pTxPwDeltaG=OVERFLOW_DATA&e2pTxPwDeltaMix=OVERFLOW_DATA&e2pTxPwDeltaN=OVERFLOW_DATA&readE2P=OVERFLOW_DATAIn this example, “OVERFLOW_DATA” would be replaced with the data intended to overflow the buffer.
Mitigation
As of now, the vendor has not provided any patches for this vulnerability. As a temporary mitigation, it is recommended to implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) that can detect and block attempts to exploit this vulnerability. Users are encouraged to keep a close watch on any updates from the vendor and apply patches as soon as they become available.