Critical National Infrastructure: European Organisations Under Siege

The Threat at Your Organisational Gates

European organisations confront an escalating insider security crisis as geopolitical conflicts increasingly exploit the human factor within corporate walls. According to the Insider Risk Trend Report 2026 published by advisory firm Signpost Six, 84% of European high-risk profile organisations do not feel adequately equipped to detect and handle insider incidents. This vulnerability emerges precisely when state actors, criminal networks, and activist movements transform employees, contractors, and suppliers into strategic targets for espionage, sabotage, and strategic influence operations.

Insider risk refers to potential threats posed by individuals within or closely connected to an organisation who may misuse authorised access to sensitive information and systems, either intentionally or unintentionally. The current geopolitical landscape, characterised by Russia’s ongoing war in Ukraine, shifting transatlantic relations, and escalating hybrid warfare tactics, has fundamentally altered this risk calculus for European enterprises and government bodies.

Why This Matters for European Decision-Makers

The convergence of geopolitical instability with organisational vulnerabilities creates immediate operational and strategic exposure:

* Hybrid warfare targets commercial organisations: State actors increasingly show rivalry outside classic military domains, with commercial organisations from critical infrastructure to technology companies becoming primary targets for espionage and sabotage

* Nexus of state actors and organised crime: States leverage criminal infrastructures for deniable operations, with Russia utilising extensive global criminal networks to drive cyber-attacks and physical infrastructure sabotage

* Supply chain fragility amplifies risk: Globalised operations create systemic vulnerabilities where third-party vendors, temporary workers, and dispersed logistics networks hold critical access with minimal oversight

* Technological transformation expands attack surface: Remote work, AI-driven recruitment, and vendor-dependent IT infrastructure create new insider risk vectors that traditional security measures fail to address

* Ideological polarisation weakens internal cohesion: Political tensions around climate action, international conflicts, and social policies drive employee activism that hostile actors can exploit

According to ENISA’s 2025 Threat Landscape report, public administration networks remain the primary focus at 38%, notably for hacktivists and state-nexus intrusion sets, whilst transport emerged as a high-value sector. The transport sector alone witnessed ransomware accounting for 83.9% of all incidents, demonstrating how insider access enables devastating operational disruption.

Authoritative Intelligence: The Threat Landscape Decoded

Dennis Bijker, CEO of Signpost Six, confirms that state actors and organised criminal networks increasingly target employees within organisations, as their direct access to locations, people, and sensitive information make them attractive and effective targets. This threat manifests through extreme methods including financial temptations, threats, and blackmail.

Recent intelligence reveals the operational mechanics of these threats. Flashpoint observed 91,321 instances of insider recruiting, advertising, and threat actor discussions involving insider-related activity in 2025, with Telegram serving as a primary collaboration medium. Ransomware groups and initial access threat actors continue recruiting interested insiders and exploiting human vulnerabilities through social engineering tactics.

The EU’s Critical Entities Resilience Directive, which entered force on 16 January 2023, creates a framework supporting member states in ensuring critical entities can prevent, resist, absorb, and recover from disruptive incidents caused by natural hazards, terrorism, insider threats, or sabotage. Member states must adopt national strategies for enhancing critical entity resilience and conduct risk assessments by 17 January 2026.

The European Union Institute for Security Studies identifies a major strike on EU critical infrastructure, such as subsea sabotage or power-grid shutdowns, as the top security risk for 2026. Breakout times have dropped below an hour, with identity abuse overtaking malware as the primary intrusion path, fundamentally altering the threat timeline for organisational response.

Strategic Benefits for European Corporates and Government

Implementing robust insider risk programmes delivers measurable operational and strategic advantages:

Operational resilience: Organisations that map access pathways, implement behaviour monitoring, and establish clear governance across HR, security, risk management, and legal departments maintain business continuity when competitors suffer disruption.

Regulatory compliance: Alignment with the CER Directive and upcoming national requirements positions organisations favourably with regulators whilst avoiding enforcement actions and reputational damage.

Competitive intelligence protection: Systematic vetting of employees, contractors, and third-party vendors safeguards proprietary research, strategic planning, and market-sensitive information from state-sponsored economic espionage.

Supply chain integrity: Enhanced third-party risk management, particularly for defence contractors and critical infrastructure operators, prevents compromise of entire operational ecosystems through single vendor vulnerabilities.

Workforce trust and culture: Transparent communication about security expectations, combined with channels for ethical concerns, builds organisational cohesion that withstands external manipulation attempts.