CVE-2020-26728 : Security Advisory and Response
Discover the critical CVE-2020-26728 affecting Tenda AC9 routers, allowing remote code execution. Learn about the impact, affected versions, and mitigation steps.
A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN that allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.
Understanding CVE-2020-26728
This CVE identifies a critical vulnerability in specific Tenda AC9 router versions that can be exploited for remote code execution.
What is CVE-2020-26728?
The vulnerability in Tenda AC9 routers enables attackers to execute arbitrary code remotely by manipulating shell metacharacters in a specific field during a POST request.
The Impact of CVE-2020-26728
The exploitation of this vulnerability can lead to unauthorized remote code execution on affected Tenda AC9 routers, potentially compromising the security and integrity of the device and network.
Technical Details of CVE-2020-26728
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows threat actors to inject malicious code through shell metacharacters in the guestuser field, exploiting the __fastcall function with a POST request on Tenda AC9 routers.
Affected Systems and Versions
- Tenda AC9 v3.0 V15.03.06.42_multi
- Tenda AC9 V1.0 V15.03.05.19(6318)_CN
Exploitation Mechanism
Attackers can leverage the vulnerability by inserting specific shell metacharacters in the guestuser field, triggering the execution of unauthorized commands on the affected routers.
Mitigation and Prevention
Protecting systems from CVE-2020-26728 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Disable remote management access if not required
- Implement strong firewall rules to restrict unauthorized access
- Regularly monitor network traffic for any suspicious activities
Long-Term Security Practices
- Keep router firmware up to date with the latest security patches
- Conduct regular security audits and penetration testing
- Educate users on safe browsing habits and security best practices
Patching and Updates
- Apply patches provided by Tenda for the affected router models to mitigate the vulnerability