CVE-2021-35327 : Vulnerability Insights and Analysis
Learn about CVE-2021-35327, a security flaw in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 that allows unauthorized Telnet service access. Find out the impact, affected systems, and mitigation steps.
A vulnerability in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 allows attackers to start the Telnet service, then login with the default credentials via a crafted POST request.
Understanding CVE-2021-35327
This CVE discloses a security flaw in TOTOLINK A720R routers that enables unauthorized access to the Telnet service using default credentials.
What is CVE-2021-35327?
The vulnerability in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 allows attackers to activate Telnet through a malicious POST request and subsequently log in using default credentials.
The Impact of CVE-2021-35327
The exploit permits unauthorized individuals to gain entry to affected routers' Telnet service, increasing the risk of unauthorized configuration changes or malicious activities.
Technical Details of CVE-2021-35327
The following points outline critical technical aspects of CVE-2021-35327:
Vulnerability Description
Attackers can exploit this vulnerability to initiate the Telnet service and gain access to affected TOTOLINK A720R routers using default login details via a specially crafted HTTP POST request.
Affected Systems and Versions
The vulnerability affects TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911. Users of this specific firmware version are at risk of unauthorized access.
Exploitation Mechanism
By sending a carefully designed POST request, threat actors can trigger the Telnet service on vulnerable TOTOLINK A720R routers and log in using default credentials.
Mitigation and Prevention
To safeguard against CVE-2021-35327, implement the following protective measures:
Immediate Steps to Take
Immediately disable the Telnet service on TOTOLINK A720R routers. Change default credentials to strong, unique passwords to mitigate the risk of unauthorized access.
Long-Term Security Practices
Regularly update router firmware to the latest version to patch known vulnerabilities and enhance overall security posture.
Patching and Updates
Keep abreast of security updates from TOTOLINK and apply patches promptly to prevent exploitation of known vulnerabilities.