Independent Security Partner since 2005
Defending your future.
Today.
Security built for a world where attackers use AI. DEFION combines offensive security expertise with AI that continuously detects, validates, and challenges your defenses. You see what’s happening in minutes and act before attackers get in.
Attackers already use AI to increase the speed and scale of cyberattacks. DEFION combines offensive security expertise with AI-driven analysis to help organisations respond with the same level of visibility, validation and speed. Active Defense means threats are hunted proactively, controls are continuously tested and response starts before incidents escalate.
DEFION in numbers
100+ specialists.
Two offices.
One team.
Zoetermeer and Barcelona. Real people, senior expertise. No offshore support, no call-center triage. When you call DEFION, you reach the engineer who can actually help.
Independent since 2005. Still driven by the people who founded it.




From tech and compliance
to crisis. One partner.
No juggling five vendors for five problems. One team that covers your entire security posture, from advisory to 24/7 monitoring and crisis response.
Independent.
AI-accelerated.
20 years proven.
You get advice without a hidden sales agenda. DEFION doesn't sell products, only protection. That means our recommendations are always in your interest.
From boardroom to server room, 24/7 monitoring and AI-accelerated pentesting. One partner for your entire attack surface: IT, OT, and IoT.
About DEFION →Faster detection.
Less noise.
Better decisions.
You only get alerts that matter. No flood of false positives, no overwhelmed security team. Our technology filters the noise, our experts make the calls.
The result: threats detected in minutes instead of days. And when it counts, there are always people ready who know what to do.
Alert within 4 minutes
No hours or days waiting for an alarm
Only what matters
Your team sees relevant alerts, not thousands
Pentest in 24 hours
First vulnerabilities same day, not after weeks
Experts who decide
No automated guesswork, real human judgment
What we see right now. Week 29 · July 17, 2026
Week 29, 2026 · Updated July 17, 2026
Our TI team monitors 40+ sources 24/7. These are the most relevant threats for European organizations, updated July 17, 2026 (week 29).
NCSC-2026-0239: SonicWall SMA1000 two actively exploited zero-days. CVE-2026-15409 (SSRF, CVSS 9.8) and CVE-2026-15410 (code injection AMC, CVSS 9.8). Patch now.
NCSC-2026-0239 confirms two actively exploited zero-days in SonicWall SMA1000: CVE-2026-15409 (unauthenticated SSRF, CVSS 9.8) and CVE-2026-15410 (post-auth code injection, CVSS 9.8). Patch immediately and check all SonicWall SMA1000 environments for IoCs.
July 17, 2026 · Confidence: High
Read more →PLAY ransomware hits Dutch manufacturer AG Scholtes: NL manufacturing sector threat elevated. Three EU victims in one 24-hour cycle.
PLAY ransomware claimed Dutch manufacturer AG Scholtes plus Andorra Life and Svensk Direktreklam in one 24-hour cycle. Three EU countries (NL, AD, SE) hit simultaneously. NL manufacturing sector threat level elevated.
July 17, 2026 · Confidence: High
Read more →CVE-2026-50522 (CVSS 9.8): Microsoft SharePoint RCE with no user interaction required. Part of July 2026 Patch Tuesday - NCSC-2026-0237.
CVE-2026-50522 (CVSS 9.8) enables Remote Code Execution on Microsoft SharePoint with no user interaction required. Part of July 2026 Patch Tuesday. Microsoft expects active exploitation is likely. Patch immediately.
July 17, 2026 · Confidence: High
Read more →We speak your language.
Newsroom
Digital sovereignty is not a political debate, but a question of continuity
DEFION contributed to the white paper 'Digital autonomy in practice: from dependence to control' by Cyberveilig Nederland. What it means for your organisation.
AZ and DEFION Security: Official Supplier for Optimal Data Protection
AZ and DEFION enter into a multi-year strategic partnership as Official Supplier to strengthen the club's digital resilience. DEFION protects the valuable data AZ uses for performance on and off the pitch.
CVE-2026-31431 ("Copy Fail"): Critical Linux Privilege Escalation Vulnerability Explained
CVE-2026-31431 ("Copy Fail") is a Linux kernel vulnerability enabling stealthy privilege escalation to root. Learn about the impact, affected systems, and mitigation steps.
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