The report highlights troubles at US-CERT, in particular turnover in leadership and severe understaffing.

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The US-CERT, which is affiliated with the Department of Homeland Security, is advising people to disable Java in Web browsers.

CNN: STORY HIGHLIGHTS

Underscoring the risk, the United States Computer Emergency Readiness Team (US-CERT) found that approximately 27 percent of the 42, 854 agency-reported security incidents during the 2011 fiscal year involved malicious code.

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The US Computer Emergency Readiness Team (US-CERT) has told computer users to be wary of potential e-mail scams, as well as fake anti-virus and phishing attacks regarding the Japan earthquake and the tsunami disasters.

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"I am in the process of updating security policies and am also working with center CIOs on additional measures recommended by US-CERT to mitigate removable media risks, " wrote chief information officer Jonathan Pettus in an e-mail to employees.

FORBES: Sneakergate