Zoom Patches Zoomsday Vulnerability Enabling Remote Code Execution in Meetings
Zoom has addressed four vulnerabilities that could allow attackers to compromise meeting participants, including flaws leading to remote code execution without any victim interaction. The most severe issue, CVE-2026-53413, rated 8.3 and nicknamed Zoomsday, resides in the annotation feature used for drawing, highlighting, or adding text during screen sharing. This component processes network data using fixed 128-byte buffers without proper size validation, enabling memory corruption that alters program execution flow. Researchers demonstrated the attack on macOS by silently launching Safari on the victim's machine. The flaws affect Zoom Workplace, Zoom Rooms, Meeting SDK, and VDI clients. Users must update to patched versions such as Workplace 7.1.5 or 7.0.6, and Zoom Rooms or Meeting SDK 7.1.5 to mitigate annotation-related risks. No active exploitation has been observed publicly, yet centralized enterprise deployments require priority updates since attacks can occur during live meetings.
BoletimSecAug 12, 2026Translated from Portuguese