CVE-2021-40128 : Security Advisory and Response

Cisco Webex Meetings Email Content Injection Vulnerability was published on 2021-11-03. The vulnerability affects Cisco Webex Meetings, allowing an unauthenticated remote attacker to tamper with account activation emails.

Understanding CVE-2021-40128

This section provides an overview of the email content injection vulnerability in Cisco Webex Meetings.

What is CVE-2021-40128?

A vulnerability in the account activation feature of Cisco Webex Meetings enables an unauthenticated attacker to manipulate account activation email content. Insufficient validation of user parameters triggers the vulnerability.

The Impact of CVE-2021-40128

The exploit could lead to an attacker directing users to malicious websites via tampered activation links in emails. As of the advisory date, there were no known public exploits.

Technical Details of CVE-2021-40128

Explore details like the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows unauthenticated attackers to send account activation emails with malicious activation links, potentially compromising recipient security.

Affected Systems and Versions

Product: Cisco Webex Meetings
Vendor: Cisco
Affected Version: Not applicable

Exploitation Mechanism

Attacker crafts HTTP requests to the account activation page
Successful exploitation results in sending recipients activation emails with tampered links

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-40128.

Immediate Steps to Take

Implement Cisco's recommended security updates and patches
Educate users to avoid clicking on suspicious email links
Monitor email communications for any suspicious activity

Long-Term Security Practices

Regularly update and patch Cisco Webex Meetings software
Conduct security awareness training for users regarding email safety
Employ email filtering mechanisms to flag potentially harmful emails

Patching and Updates

Stay informed about the latest security patches and updates released by Cisco to address the vulnerability.