Symantec Endpoint Protection 14.3 Build 558 ⇒

Broadcom changed the licensing model for SEP effective 2021. For , note:

Independent AV-Comparatives and SE Labs tests from Q3 2020 showed SEP 14.3 Build 558 achieving a against real-world ransomware (WannaCry variants, Ryuk, REvil).

C:\ProgramData\Symantec\Symantec Endpoint Protection\CurrentVersion\Data\Logs\ Communication Sylink.xml file to restore or re-establish communication symantec endpoint protection 14.3 build 558

As the initial release of the 14.3 series, this version brought several technical enhancements designed for modern enterprise environments:

to reduce scan overhead by only inspecting files identified as high-risk or unknown. Reduced Footprint Broadcom changed the licensing model for SEP effective 2021

Administrators can now use a custom PAC file for Web Security Service (WSS) traffic redirection. This helps resolve compatibility issues with third-party apps that previously struggled with local proxy servers on the loopback adapter.

✅ Acceptable for business systems (2020+ hardware). Not for thin clients or legacy POS machines. Reduced Footprint Administrators can now use a custom

Warning: Build 558 does NOT support direct upgrade from SEP 12.1.x. You must first upgrade to SEP 14.2, then to 14.3.558.

To improve system stability, the antivirus scan process was moved to a separate service from the main non-security service. This change ensures that scans use memory more efficiently and continue even if the main service encounters issues.