Total Voting Rights

27 April 2018

Corero Network Security plc

("Corero," the "Company" or the 'Group')

Total Voting Rights

Further to the admission of the Placing Shares to trading on AIM this morning, the Company announces that its issued share capital now consists of 384,982,859 ordinary shares of 1 pence each ("Ordinary Shares"). The Company holds no Ordinary Shares in treasury.

The above figure of 384,982,859 Ordinary Shares may be used by shareholders as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change in their interest in, the Company under the FCA's Disclosure and Transparency Rules.

Enquiries:

Corero Network Security plc Tel: 01895 876 382Andrew Miller, CFO

Cenkos Securities plc Tel: 020 7397 8900Mark Connelly NOMAD Michael Johnson - Sales

Vigo Communications Tel: 020 7830 9703Jeremy Garcia / Ben Simons [email protected]