Zoom zapped with a class action lawsuit.

A shareholder, Michael Drieu, on Tuesday accused the video-conferencing app maker of overstating its privacy standards and failing to disclose that it had not provided end-to-end encryption for its service.

The shareholder also claimed the string of recent media reports about the app's privacy flaws have hurt the company's high-flying stock.

Zoom Video Communications' shares have lost nearly a third of their market value since hitting record highs in March.

But they're still up 67% so far this year, making them one of the few winners amid the massive market sell-off.

That's because Zoom has mushroomed in popularity.

Millions of new users worldwide have signed up as they're forced to work from home amid lockdowns.

But the company is also facing a backlash from users worried about the lack of security and the phenomenon of "zoombombing," where uninvited guests crash into meetings.

SpaceX has banned staff from using Zoom.

Taiwan has barred agencies from using the app.

Zoom CEO Eric Yuan has apologized to users, saying he's taking steps to fix the issues.

The company did not respond to a request for comment after market hours.