Symantec Endpoint Protection Upgrade 14.2 To 14.3 【2026 Release】

Upgrading the Symantec Endpoint Protection Manager (SEPM) from 14.2 to 14.3 is generally straightforward, but it requires more prep work than previous "point" updates.

Option B: Pull from SEPM (for remote/VPN clients)

• Clients will auto-upgrade if policy is set: Policies → General → Keep Clients Updated → Download packages from management server.

Step 6: Verify the Upgrade

Why Upgrade from SEP 14.2 to 14.3?

Before executing the upgrade, it is crucial to understand the business and technical drivers. Version 14.2, while stable, lacks several key enhancements found in 14.3. symantec endpoint protection upgrade 14.2 to 14.3

Phase 3: Upgrade SEP Clients (to 14.3)

Option A: Push from SEPM (Recommended)

1. Import 14.3 client packages:

   Pre-Upgrade Checklist (Do Not Skip)

   Failure to prepare is preparing for a failed upgrade. Complete these steps before touching your SEPM. Clients will auto-upgrade if policy is set: Policies

   1. Download the 14.3 installer from Broadcom’s support portal (file name typically Symantec_Endpoint_Protection_14.3.0_All_Clients_CS.exe).
   2. Stop the SEPM service via Services.msc (optional but recommended for file replacement).
   3. Run the installer as Administrator on your SEPM host.
   4. Choose "Upgrade" when prompted.
   5. Re-enter your database credentials (SQL authentication or Windows auth).
   6. Let the installer migrate the database schema – this can take 10–30 minutes depending on your DB size.
   7. After completion, open the SEPM console and verify the version under Help > About.