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Symantec Offers Webcast Highlighting Findings of Latest Internet Security Threat Report

CUPERTINO, Calif. - Oct. 6, 2003 - Symantec Corp. (Nasdaq: SYMC), the world leader in Internet security, today announced that it will host a Webcast highlighting findings of its most recent Internet Security Threat Report. This report is one of the most comprehensive sources of Internet threat data in the world. The Webcast will be held Thursday, October 9 at 11 a.m. PST. Attendees can register at http://enterprisesecurity.symantec.com/content/webcastinfo.cfm?webcastid=68.

Symantec's Internet Security Threat Report, issued on October 1, includes analysis of data from Symantec Managed Security Services customers as well as more than 20,000 DeepSight Threat Management System registered sensors worldwide monitoring attack activity in more than 180 countries. The report covers network-based attacks, a review of vulnerabilities discovered and exploited, and highlights of malicious code trends.

Rob Clyde, Chief Technology Officer at Symantec, will lead the Webcast. His discussion will help Webcast attendees to gain a deeper understanding of the state of overall Internet threats, and what these threats mean to their organizations.

"Symantec's Internet Security Threat Report represents the most comprehensive assessment of emerging and future Internet threats," said Clyde. "This Webcast provides an opportunity for interested parties to learn more about key trends related to Internet attacks, vulnerabilities and malicious code as well as information needed to assess and mitigate the risk of cyber attack."

The Webcast will highlight key findings of the report. Symantec's Internet Security Threat Report found that the increasing prevalence of blended threats remains one of the most significant security issues companies face this year. Blended threats accounted for 60 percent of malicious code submissions in the first half of 2003, and the number of blended threats increased by 20 percent. Additionally, the speed of propagation of blended threats is increasing. For example, the Slammer worm impacted systems worldwide in less than a few hours. The report also found that 64 percent of all new attacks targeted vulnerabilities less than one year old and that the time from discovery to outbreak continues to shorten significantly.

About Symantec's Internet Security Threat Report
Attack trends in the report are based on analyses from Symantec DeepSight Threat Management System and Symantec Managed Security Services. Symantec DeepSight Threat Management System analyzes continuously collected attack data from more than 20,000 registered sensors in more than 180 countries around the world. Vulnerability trends are based on statistical analysis of data housed in the Symantec Security Response vulnerability database, which contains information on more than 8,000 distinct vulnerabilities. Malicious code trends are based on empirical data and expert analysis drawn from Symantec's comprehensive infection and malicious code databases. To download Symantec's Internet Security Threat Report, please visit http://ses.symantec.com/ITR.

About Symantec
Symantec is the world leader in providing solutions to help individuals and enterprises assure the security, availability, and integrity of their information. Headquartered in Cupertino, Calif., Symantec has operations in more than 40 countries. More information is available at www.symantec.com.

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