Synology DSM Update Version 7.4.1-90080
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Update Summary
DSM 7.4.1-90080 updates KMIP client authentication to require private CA certificates and includes USB UPS and USB device fixes after DSM 7.4. SnapshotReplication may be auto-updated or require a compatible manual update.
Update Details
Security
- KMIP client authentication now requires certificates issued by a private CA; Synology default certificates, QuickConnect certificates, and public CA certificates are not supported.
Bug Fixes
- Fixed an issue where a USB UPS could not be recognized after updating to DSM 7.4.
- Fixed an issue where USB devices could not be used on certain models after updating to DSM 7.4.
New Features
- Enhanced KMIP certificate handling to comply with updated certificate issuance policies for public certificate authorities.
Hints
- After installing this update, downgrading to a previous DSM version is not possible.
- This update will restart the Synology NAS.
- If auto update does not run, perform a manual update in Control Panel and complete the required pre-update actions.
- The update is released in a staged rollout.
- To ensure compatibility, SnapshotReplication will be automatically updated or may require a manual update to a compatible version.
- Some models will not receive this update on the device and must download the upgrade patch from Synology Download Center.
Product Information
Vendor: Synology
Product: DSM
Product type: Other
Platform: Linux
Version: 7.4.1-90080
Vendor release date: Jul 23, 2026
Original release notes: View on vendor site
Published on updatealert.io: Jul 23, 2026
Description: Operating system and management software for Synology NAS devices.