CVE-2025-11423

Comprehensive Technical Analysis of CVE-2025-11423

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-11423 CVSS Score: 9.8

The vulnerability in Tenda CH22 1.0.0.1, specifically within the formSafeEmailFilter function of the /goform/SafeEmailFilter file, allows for memory corruption through manipulation of the page argument. This vulnerability is severe, as indicated by its high CVSS score of 9.8. The severity is due to the potential for remote exploitation and the availability of a public exploit, which significantly increases the risk of widespread attacks.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: The vulnerability can be exploited remotely, meaning attackers do not need physical access to the device.
• Memory Corruption: Manipulating the page argument can lead to memory corruption, which can be leveraged to execute arbitrary code or cause a denial of service (DoS).

Exploitation Methods:

• Buffer Overflow: By sending a specially crafted request to the formSafeEmailFilter function, an attacker can overflow the buffer, leading to memory corruption.
• Code Execution: If the attacker can control the execution flow, they may inject malicious code to gain unauthorized access or control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda CH22 devices running firmware version 1.0.0.1.

Software Versions:

• The vulnerability specifically affects Tenda CH22 firmware version 1.0.0.1.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest firmware update from Tenda as soon as it becomes available.
• Network Segmentation: Isolate affected devices from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the vulnerable function.

Long-Term Strategies:

• Regular Updates: Ensure that all devices are regularly updated with the latest security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities and potential exploitation attempts.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on Cybersecurity Landscape

The availability of a public exploit for this vulnerability poses a significant risk to organizations using Tenda CH22 devices. The potential for remote exploitation and memory corruption can lead to severe consequences, including data breaches, unauthorized access, and service disruptions. This underscores the importance of timely patching and proactive security measures in the cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: formSafeEmailFilter
• File Affected: /goform/SafeEmailFilter
• Vulnerable Argument: page

Exploitation Steps:

1. Identify Target: Locate Tenda CH22 devices running firmware version 1.0.0.1.
2. Craft Exploit: Develop a payload that manipulates the page argument to cause memory corruption.
3. Deliver Payload: Send the crafted payload to the vulnerable function via a remote request.
4. Execute Code: If successful, the attacker can execute arbitrary code or cause a DoS condition.

Detection and Response:

• Log Analysis: Monitor logs for unusual activities related to the formSafeEmailFilter function.
• Anomaly Detection: Use anomaly detection tools to identify abnormal traffic patterns that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

Conclusion: CVE-2025-11423 represents a critical vulnerability in Tenda CH22 devices that requires immediate attention. Organizations should prioritize patching affected devices and implementing robust security measures to protect against potential exploitation. The availability of a public exploit heightens the urgency for proactive mitigation strategies to safeguard against potential attacks.