Grant of Options

8 January 2016

Corero Network Security plc

("Corero", the "Company")

Grant of Options

Corero Network Security plc (AIM: CNS), the AIM listed network security company, announces that on 7 Janaury 2016, options were granted over new ordinary shares to the Directors of the Company ("Options" and "Ordinary Shares") as set out below.

The Options carry an exercise price of 20.0 pence per share and vest in equal proportions on the first, second and third anniversaries of being granted. Any Ordinary Shares issued pursuant to the exercise of the Options may not be sold or otherwise transferred until the second anniversary of the date of being granted. There are no performance conditions associated to the vesting or exercise of the Options.

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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 next-generation technology provides a First Line of Defense® 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