What is CVE-2021-40128?

CVE-2021-40128 is a vulnerability in the account activation feature of Cisco Webex Meetings that allows an unauthenticated attacker to send an activation email with an arbitrary domain.

What is the severity of CVE-2021-40128?

CVE-2021-40128 has a severity rating of 5.3 which is considered medium.

How does CVE-2021-40128 impact Cisco Webex Meetings?

CVE-2021-40128 allows an unauthenticated attacker to send account activation emails with malicious activation links, potentially leading to unauthorized account access.

Is there a fix for CVE-2021-40128?

Yes, Cisco has released a security advisory with mitigation measures for CVE-2021-40128. It is recommended to apply the provided patches or updates.

Where can I find more information about CVE-2021-40128?

You can find more information about CVE-2021-40128 in the Cisco Security Advisory: [link](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-activation-3sdNFxcy).

Vulnerability/
CVE-2021-40128

medium

5.3

CWE

183

4/11/2021

5/8/2022

CVE-2021-40128

First published: Thu Nov 04 2021(Updated: )

A vulnerability in the account activation feature of Cisco Webex Meetings could allow an unauthenticated, remote attacker to send an account activation email with an activation link that points to an arbitrary domain. This vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by sending a crafted HTTP request to the account activation page of Cisco Webex Meetings. A successful exploit could allow the attacker to send to any recipient an account activation email that contains a tampered activation link, which could direct the user to an attacker-controlled website.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Webex Meetings

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-activation-3sdNFxcy

Frequently Asked Questions

What is CVE-2021-40128?
CVE-2021-40128 is a vulnerability in the account activation feature of Cisco Webex Meetings that allows an unauthenticated attacker to send an activation email with an arbitrary domain.
What is the severity of CVE-2021-40128?
CVE-2021-40128 has a severity rating of 5.3 which is considered medium.
How does CVE-2021-40128 impact Cisco Webex Meetings?
CVE-2021-40128 allows an unauthenticated attacker to send account activation emails with malicious activation links, potentially leading to unauthorized account access.
Is there a fix for CVE-2021-40128?
Yes, Cisco has released a security advisory with mitigation measures for CVE-2021-40128. It is recommended to apply the provided patches or updates.
Where can I find more information about CVE-2021-40128?
You can find more information about CVE-2021-40128 in the Cisco Security Advisory: [link](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-activation-3sdNFxcy).

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