Elon Musk's rocket company SpaceX and the US space agency NASA have banned their employees from using the video bubble app Zoom. Zoom has recently come under fire for various privacy and security concerns.

In an email dated March 28, SpaceX tells employees that all access to Zoom has been disabled immediately.

"We understand that many of us used this tool for conferences and meeting support," SpaceX writes in an internal email sent by Reuters news agency . "Please use email, SMS or telephone as an alternative means of communication."

A SpaceX spokesperson declined to comment on the mail, but two people familiar with the matter confirmed the content of the mail to Reuters .

NASA also bans its employees from using Zoom, Stephanie Schierholz, a spokesperson for the US space agency, told Reuters .

Privacy and security issues

Zoom sees the popularity increase now that many people are working from home, but has been under fire in recent days due to various privacy and security concerns. For example, vulnerabilities in the app could allow malicious parties to discover user passwords or take over users' Macs. Also, the app is not fully encrypted.

Zoom addressed the vulnerabilities in the app in two blog posts on Wednesday: It apologizes for claiming that the app was using end-to-end encryption when it was not and fixed the aforementioned vulnerabilities.

See also: Insecure passwords and weak encryption: what's going on around Zoom?