PRESS RELEASE

Tenable Network Securityâ, Inc., the leader in real-time vulnerability management, today announced that Amazon Web Services (AWS) customers can now leverage Nessus® to scan, audit, and monitor software vulnerabilities on all of their Amazon Machine Images (AMI). Together, the collaboration between Tenable and AWS provides added security through unparalleled vulnerability, configuration and patch assessment- for enterprise customers looking to build, operate or maintain their applications in the AWS cloud.

With AWS' shared responsibility security model, the company guarantees that its underlying cloud infrastructure is secure, reliable and flexible; while customers take responsibility for the security of their own AMI virtual appliance (guest OS and application). Tenable's Nessus vulnerability scanner provides these customers with the ability to efficiently and effectively improve their protection efforts by securing the AMI virtual appliance throughout the software development, deployment and production lifecycle:

· Development: scan AMI after each software build to ensure secure coding

· Staging: scan AMI before deploying into production

· Production: monitor AMI in a live AWS environment for the latest software threats and vulnerabilities

Equipped with plugins/checks specifically designed to detect vulnerabilities within AMIs, Nessus securely transmits scan results back to the Tenable SecurityCenter&trade management console for analysis alongside on-premises scan results. With this integration, Tenable customers gain peace of mind knowing that critical IT applications are secure whether hosted on premises or in the AWS cloud.

"We use Tenable's Nessus to secure our AMI before publishing to the AWS Marketplace," said Kartik Trivedi, CEO of Symosis Security. "AWS provides our company with a secure, scalable cloud infrastructure, but we needed to ensure that our AWS image is securely developed and maintained. Nessus provides us that peace of mind."

"We're excited to welcome Tenable into the AWS Marketplace today," said Terry Hanold, Vice President, Cloud Commerce, AWS. "With the addition of Tenable, AWS Marketplace customers are offered even further choice in security solutions to build on the AWS platform."

Available now as a Nessus Virtual Scanner Appliance within the AWS Marketplace (https://aws.amazon.com/marketplace/pp/B00G9A5MS0), Tenable users can roll out new Nessus AMI instances under the company's BYOL (Bring Your Own License) model. Because Nessus is available in the AWS Marketplace as a pre-built virtual appliance, users can deploy new Nessus instances quickly and easily. Once the AWS customer has purchased Nessus directly from Tenable (https://store.tenable.com) or a certified reseller, the customer will automatically receive an activation code to register and use the Nessus vulnerability scanner.

About Tenable Network Security

Tenable Network Security is relied upon by more than 20,000 organizations, including the entire U.S. Department of Defense and many of the world's largest companies and governments, to stay ahead of emerging vulnerabilities, threats and compliance-related risks. Its solutions continue to set the standard to identify vulnerabilities, prevent attacks and comply with a multitude of regulatory requirements. For more information, please visit www.tenable.com.

Forward-Looking Statements

This announcement contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Actual results may differ significantly from management's expectations. These forward-looking statements involve risks and uncertainties that include, among others, risks related to competition, management of growth, new products, services and technologies, potential fluctuations in operating results, international expansion, outcomes of legal proceedings and claims, fulfillment and data center optimization, seasonality, commercial agreements, acquisitions and strategic transactions, foreign exchange rates, system interruption, inventory, government regulation and taxation, payments and fraud. More information about factors that potentially could affect Amazon.com's financial results is included in Amazon.com's filings with the Securities and Exchange Commission, including its most recent Annual Report on Form 10-K and subsequent filings.