Notice of Results & Investor Presentation

13 April 2022

Corero Network Security plc

("Corero" or the "Company")

Notice of Results & Investor Presentation

Corero Network Security plc (AIM: CNS), a leading provider of real-time, high-performance, automatic Distributed Denial of Service (DDoS) cyber defense solutions, will announce its results for the year ended 31 December 2021 on Tuesday, 26 April 2022.

In addition, the Company will be hosting a presentation for investors in relation to the Company's full year results on Thursday, 28 April 2022 at 1.00 p.m. BST.

The presentation will be hosted on the Investor Meet Company ("IMC") digital platform and is open to all existing and potential shareholders. Investors can sign up to IMC for free and add to meet Corero via:

https://www.investormeetcompany.com/corero-network-security-plc/register-investor

Investors who have already registered and have added to meet the Company will be automatically invited.

Enquiries:

About Corero Network Security

Corero Network Security plc is a global leader in real-time, high-performance, automatic DDoS cyber defense solutions. Both Service and Hosting providers, alongside digital enterprises across the globe rely on Corero's award winning cybersecurity technology to eliminate the threat of Distributed Denial of Service (DDoS) to their digital environment through automatic attack detection and mitigation, coupled with network visibility, analytics and reporting. Corero's industry leading SmartWall and SecureWatch technology provides scalable protection capabilities against external DDoS attackers and internal DDoS botnets in the most complex edge and subscriber environments, while enabling a more cost-effective economic model than previously available. Corero's key operational centers located in Marlborough, Massachusetts, USA and Edinburgh, UK, with the Company's headquarters in Amersham, UK. The Company is listed on the London Stock Exchange's AIM market under the ticker CNS. For more information, visit  www.corero.com