CVE-2025-52221 is a critical vulnerability affecting the Tenda AC6 15.03.05.16_multi firmware. This vulnerability allows for a buffer overflow in the formSetCfm function through the funcname, funcpara1, and funcpara2 parameters. The severity of this vulnerability is rated at a CVSS score of 9.8, indicating a high risk to organizations.
The implications of this vulnerability are severe, as it can be exploited without requiring authentication, with low attack complexity and no user interaction. Organizations using this firmware must understand the risks involved and take immediate action to mitigate potential threats.
Given the critical nature of this vulnerability, organizations should prioritize patching immediately. Failure to address this vulnerability could lead to severe consequences, including unauthorized access and significant data breaches.
Currently, there is no public exploit available, but the nature of buffer overflow vulnerabilities means that potential exploitation could be imminent. Organizations must remain vigilant and proactive in their security measures.
Vulnerability Details
Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters. This vulnerability is classified under CWE-787 (Out-of-bounds Write) and CWE-120 (Buffer Copy without Checking Size of Input).
The vulnerability has a CVSS score of 9.8, highlighting the critical nature of the flaw. The attack vector is network-based, with low attack complexity and no privileges required for exploitation. The impacts on confidentiality, integrity, and availability are all rated high.
This vulnerability was published on April 8, 2026, and has been analyzed thoroughly. Organizations using the Tenda AC6 firmware should review their systems to ensure they are not affected.
Technical Analysis
The root cause of CVE-2025-52221 is a buffer overflow vulnerability in the Tenda AC6 firmware, specifically within the formSetCfm function. This function does not adequately validate input parameters, allowing attackers to overwrite memory and execute arbitrary code.
The attack vector is network-based, meaning that an attacker could exploit this vulnerability remotely without needing physical access to the device. The attack complexity is low, and no user interaction is required, making it easier for attackers to exploit this vulnerability.
The vulnerability requires no privileges to exploit, which means any unauthorized user could potentially exploit it to gain control over the affected device. The impacts on confidentiality, integrity, and availability are all rated as high, indicating that successful exploitation could lead to unauthorized data access and control over the device.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive information, potential network breaches, and the compromise of critical systems. The exploitation of this vulnerability could lead to significant data loss and reputational damage.
The blast radius for this vulnerability is extensive, as it affects all devices running the vulnerable firmware. Organizations must assess their exposure and take corrective action to mitigate risks associated with this vulnerability.
Given the CVSS score of 9.8, organizations should prioritize patching immediately. The potential for exploitation is significant, and proactive measures are essential to protect systems from compromise.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version is Tenda AC6 firmware version 15.03.05.16_multi. Organizations using this version should take immediate action to secure their systems.
Mitigation & Remediation
Organizations should prioritize patching the affected Tenda firmware. Ensure that the latest version is deployed as soon as it becomes available. If a patch is not available, consider implementing network controls to limit the exposure of affected devices.
For further guidance on securing your systems, organizations can refer to our penetration testing services to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual activity and behavioral anomalies that could indicate an attempted exploitation of this vulnerability. Network security systems should be configured to detect and alert on potential buffer overflow attempts.
AppSecure Threat Intelligence Insight
CVE-2025-52221 highlights significant risks associated with buffer overflow vulnerabilities. Security teams must remain vigilant and proactive in addressing such vulnerabilities to prevent data breaches.
The trend of buffer overflow vulnerabilities continues to pose challenges for organizations. It is crucial for security teams to implement robust security measures and conduct regular security assessments to identify vulnerabilities.
Organizations can enhance their security posture by engaging in penetration testing methodologies that provide insights into vulnerabilities.
Finally, organizations should consider investing in vulnerability management programs to effectively manage and remediate vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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