In a nutshell: The NCSC warns of global attacks on Fortinet firewalls and VPN gateways and calls on organizations to take immediate protective measures.
The British National Cyber Security Centre (NCSC) has issued a warning about a global attack campaign targeting Fortinet firewalls and VPN gateways. Organizations are urged to take action immediately.
The NCSC has called on organizations using Fortinet products to take immediate security measures. The background is a worldwide attack campaign specifically targeting Fortinet firewalls and VPN gateways.
For CISOs, the warning is relevant because VPN gateways and firewalls are among the most critical access control points in IT infrastructure. A compromised gateway potentially gives attackers access to the internal network without having to undergo further authentication.
Affected organizations should immediately review their Fortinet systems, apply patches, and implement the recommendations provided by the NCSC. This should be done with the highest priority, as active attack campaigns typically require short response cycles.
Source: www.ncsc.gov.uk · Published 18 June 2026
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