DSM 7.3.1 and SRM 1.3.1 Update Review and Fixes
What has changed and what has broken in DSM 7.3.1 and SRM 1.3.1 updates
The most recent DSM and SRM updates from Synology are mostly about making things more stable and secure, but real-world use always reveals edge cases. This review is about DSM 7.3.1-86003 (with Update 1) and SRM 1.3.1-9346 (with Update 14 as the main focus). It talks about what got better, what users say is broken, and how to fix problems without risking downtime. Read practical DSM 7.3 upgrade feedback and tips
What DSM 7.3 is all about and why 7.3.1 is important
DSM 7.3 brought a lot of improvements to the platform, such as better storage efficiency, security posture, and collaboration features. These include Synology Tiering behavior and security hardening practices that were mentioned in Synology’s own DSM 7.3 announcement.
On October 28, 2025, DSM 7.3.1-86003 was released. It fixed real-world problems with devices that were reported in the field, such as how certain models adjust the brightness of their LEDs.
Then, on November 18, 2025, DSM 7.3.1-86003 Update 1 came out. It was called a “important” update because it fixed a security issue and was sent out in stages. Explore how DSM updates impact NAS security in 2025-2026
What SRM 1.3.1-9346 Update 14 says it fixes
The October 28, 2025, release of SRM 1.3.1-9346 Update 14 talks about an improvement to the “network connectivity check mechanism.” It is also being sent out in stages.
That sounds small, but connectivity checks can change how WAN detection works, how failover works, and how people think about “internet down” events, especially in mesh or mixed wired and wireless backhaul setups.
Problems that people often report after these updates
Confusion about update visibility: Some systems don’t show the update right away. Synology’s staged rollout language makes people think that updates are missing when they are just gated.
Timing of package compatibility: When admins upgrade major DSM branches, they sometimes run into third-party package lag. People in the community have talked about this pattern, such as when Active Backup for Business would work with early versions of DSM 7.3. Discover how combining ActiveProtect with Active Backup improves disaster recovery
External device and alert problems: DSM 7.3.1-86003 is also talked about in forums about external device visibility and alerts. These can seem like storage problems, but they are usually just changes to the UI or the path that the device uses to be detected.
Users say that SRM Update 14 has problems
Users of the RT6600ax, RT2600ac, and MR2200ac say that their devices freeze up from time to time and lose both wired and wireless internet. This happens after Update 14.
When opening some functions, the router UI freezes. Reports from early 2026 still mention freezes on the RT2600ac after upgrading to 1.3.1-9346-14.
Fixes that work and a safe order for troubleshooting
For DSM 7.3.1
Before you update, make sure your package is ready. In Package Center, look for updates to backup, virtualization, and directory-related packages first. If a critical package isn’t compatible yet, don’t update the DSM on production units.
Export configuration and check backups: Before updating the OS, export the DSM configuration and check at least one restore path (file restore or VM restore) to make sure the backups can be used.
If symptoms show up after the update:
Restart your computer once, then keep an eye on Resource Monitor and Log Center for errors that keep happening.
If external devices “disappear,” check the power supply, reconnect USB cables, and look over logs related to storage before rebuilding anything.
For Update 14 of SRM 1.3.1-9346
First, back up the router’s settings by exporting the SRM settings so that a rollback or reset won’t be a disaster.
If you see freezes or “internet down” events:
To figure out if the problem is with the package or the base OS, turn off high-load packages like Threat Prevention for a short time and then turn them back on when things are stable again. Some reports from SRM updates have said that connectivity problems are caused by Threat Prevention behavior in some environments.
Make sure to check your IPv6 settings and WAN monitoring logic, especially in mesh setups, because previous SRM updates have fixed problems with IPv6 reliability.
If the UI freezes, try reducing the number of admin sessions, clearing the browser cache, and testing access from a different device. If UI hangs keep happening, set up a time for maintenance to reboot and check the logs.
A paragraph about the solution that focuses on Synology
Synology updates DSM and SRM by rolling them out in stages and making them stronger over time. See a comprehensive Synology OS updates guide covering DSM, SRM, and features. The release notes for DSM 7.3 focus on security updates and making the platform more stable. Update 1 for DSM 7.3.1, on the other hand, focuses on fixing a security hole. On the router side, SRM 1.3.1-9346 Update 14 focuses on how routers check for connectivity, which can have a direct effect on how they find out about WAN status and fix temporary problems.
Epis Technology is a company that
Epis Technology helps businesses safely apply DSM and SRM updates with as little downtime as possible and clear rollback paths. They help with Synology consulting and support, design big storage solutions, and set up backup systems that are strong, like Microsoft 365 and Google Workspace backups and fully managed PC backups. Learn how integrating Synology enables seamless Google Workspace backup protection. Epis Technology also helps IT teams check the effects of updates, make sure that backups are ready to go, and make NAS and network settings more secure so that business can continue.