Significant Contract Renewal

1 November 2017

Corero Network Security plc

("Corero" or the "Company")

Corero material SmartWall support and managed services contract renewal

Corero Network Security plc (AIM: CNS), the AIM listed network security company, is pleased to announce the renewal of a contract, worth over $200,000, from a significant early adopter of SmartWall Threat Defense ("SmartWall") customer.

This is the third consecutive year that the Digital Enterprise customer ("the Customer") has renewed its contract, which is testament to the effectiveness of its real-time DDoS mitigation software.

The agreement will see Corero supply support and SecureWatch managed security services for the Customer's SmartWall installation, which provides always-on real-time DDoS mitigation to ensure that its on-line business and revenue is not impacted by damaging DDoS attacks.

Andrew Lloyd, Corero President and EVP Sales and Marketing, said:

"This important renewal demonstrates the exceptionally high levels of customer satisfaction across our growing customer base with Corero delivering world class subscription and support renewal rates."

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About Corero Network Security

Corero Network Security is the leader in real-time, high-performance DDoS defense solutions. Service providers, hosting providers and online enterprises rely on Corero's award winning technology to eliminate the DDoS threat to their environment through automatic attack detection and mitigation, coupled with complete network visibility, analytics and reporting. This industry leading technology provides cost effective, scalable protection capabilities against DDoS attacks in the most complex environments while enabling a more cost effective economic model than previously available. For more information, visit www.corero.com