The Synology RS2421+ is a 2U rack-mountable 12-bay NAS with an AMD Ryzen quad-core processor and two M.2 NVMe SSD cache slots, expandable to 24 drives for growing business rack environments. It runs DiskStation Manager and supports optional 10GbE connectivity, Btrfs snapshots, and comprehensive backup and file services.
Product released: January 1, 2021
Latest firmware version
Version 7.3.2-86009 Update 4, released July 29, 2026
Last checked for updates: Aug 2, 2026 10:30 UTC
What's new in version 7.3.2-86009 Update 4
Important notes
Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
This update will restart the device.
Fixed Issues
Fixed security vulnerabilities (Synology-SA-26:06).
firmware version history
LatestUpdate has tracked 18 versions of Synology RS2421+ firmware, released between November 26, 2024 and July 29, 2026.
Version 7.3.2-86009 Update 4 - July 29, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.4.1-90080 - July 23, 2026: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto u…
Version 7.2.2-72806 Update 9 - June 30, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.4-90075 - June 16, 2026: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto u…
Version 7.3.2-86009 Update 3 - March 19, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 8 - March 19, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.3.2-86009 Update 2 - March 16, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 7 - March 16, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.3.2-86009 Update 1 - February 10, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 6 - January 30, 2026: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.3.2-86009 - December 2, 2025: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto u…
Version 7.3.1-86003 Update 1 - November 18, 2025: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 5 - November 18, 2025: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.3.1-86003 - October 28, 2025: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto u…
Version 7.3-81180 - October 8, 2025: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto u…
Version 7.2.2-72806 Update 4 - July 24, 2025: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 3 - February 13, 2025: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Version 7.2.2-72806 Update 2 - November 26, 2024: Important notes Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, p…
Update prediction
This product was recently updated. The next firmware update is expected between August 13, 2026 and October 7, 2026.
Synology typically releases firmware updates for this product approximately every 20 days.
The Synology RS2421+ is a 2U rack-mountable 12-bay NAS with an AMD Ryzen quad-core processor and two M.2 NVMe SSD cache slots, expandable to 24 drives for growing business rack environments. It runs DiskStation Manager and supports optional 10GbE connectivity, Btrfs snapshots, and comprehensive backup and file services. It was originally released on January 1, 2021.
What is the latest firmware version of Synology RS2421+?
The latest firmware version of Synology RS2421+ is 7.3.2-86009 Update 4. It was released on July 29, 2026.
What changed in Synology RS2421+ firmware version 7.3.2-86009 Update 4?
Synology RS2421+ firmware version 7.3.2-86009 Update 4 includes the following changes: Important notes
Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
Your DSM is working fine without having to update. The system evaluates service statuses and system set...
How do I update the Synology RS2421+ firmware?
To update the Synology RS2421+ firmware, download the latest version (7.3.2-86009 Update 4) from Synology's website. Follow Synology's installation instructions, which typically involve copying the firmware file to a memory card or connecting via USB. Visit the official Synology product page for download instructions.
How do I check for Synology RS2421+ firmware updates?
You can track Synology RS2421+ firmware updates automatically on LatestUpdate.io. We monitor Synology's releases and notify you when new firmware versions are available, so you never miss an update.
How often does Synology release firmware updates for Synology RS2421+?
We have tracked 18 firmware versions of Synology RS2421+. Based on historical patterns, updates are released approximately every 20 days. Synology releases updates to fix bugs, improve performance, and add new features. Track this product on LatestUpdate.io to be notified of future releases.
When is the next Synology RS2421+ firmware update expected?
Synology RS2421+ was recently updated. Based on this product's update history, the next firmware update is expected between August 13, 2026 and October 7, 2026.
Is Synology RS2421+ still receiving firmware updates?
Yes, Synology RS2421+ received a firmware update within the last month. The most recent version is 7.3.2-86009 Update 4.
Who makes Synology RS2421+?
Synology RS2421+ is manufactured by Synology. Visit the official product page for more information.