The customer will be able to download the Hotfix from the TIBCO Support Customer Portal Web UI using their username and password for the TIBCO Support Web page. Once logged on, customers can find the Hotfix under the Download Menu :
AvailableDownloads/TEA/2.4.3/hotfix-01 OR you can use this direct link to HF: https://support.tibco.com/s/hotfixes?id=a011a000009RwqKAAS

For instructions on "How do TIBCO customers access Hot Fixes or Engineering Builds or customer-specific files", you can refer to Published Article 000022290:  https://support.tibco.com/s/article/hotfix

Please contact TIBCO Support if you have any problems finding or downloading this hotfix.

Listed below is a summary of the updates included. Refer to the associated readme document for any additional information.

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Closed Issues in 2.4.3 HF-001 (This Release)
TEA-3807
Resolved Local File Inclusion (LFI) vulnerability in LogBack File Upload 
through the location parameter.
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TIBCO Enterprise Administrator (TEA) 2.4.3 Hotfix 01 is now available.