Overview
The cybersecurity world has witnessed another significant vulnerability, this time affecting Tenda AC18 15.03.05.19. The flaw, officially termed as CVE-2025-11122, resides in an unknown function of the file /goform/WizardHandle. If maliciously exploited, it can lead to a stack-based buffer overflow, one of the most severe types of vulnerabilities. The exploit is now publicly available, making it a pressing issue for any entity using the affected product. This vulnerability matters because it can potentially lead to system compromise or data leakage, putting sensitive information at risk.
Vulnerability Summary
CVE ID: CVE-2025-11122
Severity: Critical, CVSS Score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda AC18 | 15.03.05.19
How the Exploit Works
The vulnerability stems from a flaw in the handling of the WANT/mtuvalue argument in the /goform/WizardHandle file. An attacker can manipulate this argument, triggering a stack-based buffer overflow. This type of overflow allows the attacker to overwrite the program’s control flow, potentially leading to the execution of arbitrary code. The exploit can be launched remotely over a network, making it a serious threat.
Conceptual Example Code
A hypothetical exploitation of this vulnerability might look something like this:
POST /goform/WizardHandle HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
WANT=1&mtuvalue=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIn the above example, the “mtuvalue” argument is filled with an excessive amount of ‘A’ characters, causing a buffer overflow.
Mitigation Guidance
To mitigate the risk posed by CVE-2025-11122, users of the affected product should immediately apply the vendor patch as soon as it’s available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These measures can help detect and block attempts to exploit the vulnerability, thus reducing its potential impact.
Remember, staying vigilant and keeping your systems updated is the best way to ensure your digital security.
