Major Capricorn update for Endpoint Protection – September 2025

UPDATE 2025-09-16: The update is expected to be released on 17th September 2025, with version “WithSecure Capricorn Engine (2025-09-17_01). The total size of the update package will be ~63MB.

We will soon be releasing a major update for our Capricorn engine, used by our Endpoint Protection products. This is expected to be released on September 17th 2025.

Key Improvements

• Optimized database & extended machine learning → reducing pattern file sizes while maintaining the same high detection rate.
• Component size reduction of more than 40% → from 210 MB down to 126 MB total.
• Faster initialization & lower memory consumption → improving overall performance on endpoints.

Update Details

• Expected update delta size: ~79 MB.
• Platform coverage: This update applies to all WithSecure Endpoint Protection products that utilize the Capricorn engine — across Windows, Mac and Linux platforms.
• Download size: All affected endpoints will now download a larger one-time update package of approximately 79 MB during the rollout.

Deployment

• The update will be delivered automatically.
• No manual action or configuration is required.
• The release time will be confirmed 24 hours in advance through our community channels.
• Updates containing this release will start with “WithSecure Capricorn Engine (2025-09-xx-xx)”
• With this update, you can expect leaner, faster, and more efficient endpoint protection — without compromising security.