Zoom Zero-Day Affects Millions

In a stark reminder of how quickly cyber threats can evolve, a critical zero-day vulnerability has been discovered in Zoom, a platform used by millions for video conferencing worldwide.

CVE-2025-4221 allows attackers to execute remote code via crafted video streams, meaning they can potentially take control of a device without the user clicking or downloading anything. All it takes is joining a compromised video call.

Zoom acted swiftly, releasing a patch within 72 hours of discovery. However, threat actors were already exploiting the flaw in the wild before many users had updated their clients.

Why It Matters:

• High Impact, High Reach: Zero-day exploits in widely-used tools like Zoom have huge blast potential.
• No User Action Needed: This exploit could happen silently during a normal video call.
• Patch Urgency: Delays in applying patches open the door to compromise, even days matter.
• Vendor Communication is Key: Users and IT teams must stay tuned into vendor security advisories.

What You Should Do:

1. Update Zoom Immediately to the latest version.
2. Enable Auto-Update or check weekly for patches.
3. Review App Permissions and session settings regularly.
4. Monitor Security Alerts from trusted cybersecurity news sources.

Even the tools we trust for connection and productivity can become attack vectors. Zero-day threats aren’t theoretical, they’re real, active, and dangerous. Staying informed and patched is your best defense.

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New Zoom zero-day could let attackers hijack your screen. Patch now!