CVE-2012-1821: Symantec Endpoint Protection

Medium severity, CVSS 5.0. EPSS: 2.8% chance of exploitation in the next 30 days.

The Network Threat Protection module in the Manager component in Symantec Endpoint Protection (SEP) 11.0.600x through 11.0.700x on Windows Server 2003 allows remote attackers to cause a denial of service (web-server outage, or daemon crash or hang) via a flood of packets that triggers automated blocking of network traffic.

Affected products

• Symantec Endpoint Protection: version 11.0.6000 only; version 11.0.6100 only; version 11.0.6200 only; version 11.0.6200.754 only; version 11.0.6300 only; version 11.0.7000 only; …

Published 2012-05-24. Last modified 2026-06-16.