Zoom Annotation Flaws Expose Users to Hijacking Risks
A concerning vulnerability has been discovered in Zoom’s annotation feature, potentially allowing a meeting participant to take control of another attendee’s client and access their personal data. The issue affects all versions of the popular video conferencing platform, making it a pressing concern for users who rely on Zoom for remote meetings.
The flaw lies in the way Zoom handles annotations during meetings. When an annotator adds notes or drawings to a shared screen, they can potentially exploit this vulnerability by manipulating the annotation data and gaining unauthorized access to another user’s account. This could allow the attacker to intercept sensitive information, such as login credentials, or even take control of the victim’s client.
According to security experts, the issue stems from Zoom’s handling of cross-domain privilege escalation. When a user participates in a meeting, their browser creates multiple domains to handle different aspects of the interaction. However, this process can create vulnerabilities if not properly secured. In this case, the annotator can manipulate the annotation data and use it to “map” their way through these domains, ultimately gaining access to the victim’s account.
Zoom has not yet commented on the issue, but experts warn that users should remain vigilant and take immediate action to mitigate the risk. With millions of people worldwide using Zoom for remote meetings, the potential consequences are alarming. If left unaddressed, this vulnerability could lead to a significant number of users falling prey to identity exposure and active attack paths.
The Zoom annotation flaw is a stark reminder that even seemingly innocuous features can harbor hidden dangers. As we increasingly rely on video conferencing platforms for work and personal interactions, it’s essential to prioritize security and vigilance. In this case, the onus falls on users to report any suspicious activity and stay informed about potential vulnerabilities.
To protect yourself from this vulnerability, consider these best practices: Always verify the identity of participants before allowing them to join a meeting, use strong passwords and enable two-factor authentication, and keep your Zoom software up-to-date with the latest security patches. By staying proactive and aware, you can minimize the risk of falling victim to this or similar vulnerabilities.
Source: The Hacker News — 2026-08-11