Weekly Cybersecurity Digest [October, Week 1]
Posted on October 6, 2026
Dear Valued Clients,
Welcome to this week’s cybersecurity digest from Make Sense. Across Europe, recent developments highlight a recurring resilience challenge: attackers do not need every control to fail. They need one viable route into an environment, and enough access afterwards to create impact.
That route may come through a trusted third party, a vulnerable business platform, an exposed collaboration system or a convincing phishing message. This week’s developments also show why European resilience increasingly extends beyond individual organisations to the technology suppliers, communications infrastructure and cross-border systems on which essential services depend.
✅ Top Stories of the Week
i. Denmark CPR Breach Exposes Data Linked to 8.8 Million Registered Citizens
Denmark’s Central Population Register disclosed a serious security incident after unauthorised parties abused a private Danish company’s legitimate access to the CPR system. Names, addresses, CPR identification numbers and other information relating to approximately 8.8 million registered individuals were accessed. Authorities blocked the company’s access, notified Denmark’s data-protection regulator and launched a police investigation. The case demonstrates how legitimate third-party access can become a high-impact security risk when abnormal activity is not detected quickly enough. [Read more via Denmark’s CPR Administration]
ii. Cyberattack on Major Polish Invoicing Platform Exposes Business and Customer Data
On October 1, Fakturownia disclosed a breach after an attacker exploited a vulnerability and gained access to its servers. The service is used by more than 600,000 businesses, and potentially affected information includes company and user account data, password hashes, bank-account information, authentication and integration tokens, customer and partner information, and some historical invoices. [Read more via The Record]
iii. European-Led Operation Disrupts KillSec Ransomware Group
An international law-enforcement operation led by German authorities seized KillSec’s leak site and infrastructure, secured at least 110 terabytes of stolen data and resulted in three provisional arrests. Europol said the group is linked to around 1,000 suspected attacks worldwide, roughly half of which have so far been identified as successful. Investigators identified a 16-year-old as the suspected main operator, while authorities across multiple European countries searched properties and seized servers and evidence. The operation illustrates the increasingly cross-border nature of both ransomware activity and the response required to disrupt it. [Read more via Europol]
✅ Industry Trends & Insights
Russian Star Blizzard Group Scales Up Phishing Against Ukraine Supporters
Microsoft reported that Russia-linked Star Blizzard has expanded from highly targeted spear-phishing towards larger-scale campaigns aimed at Ukrainian institutions, NGOs, think tanks, governments and organisations supporting Ukraine. The group is also using a new malware-delivery technique called RedFlick, which reduces the number of actions required from a victim and helps deploy its CosmicPulse backdoor. Microsoft observed the activity affecting more than 100 organisations, primarily in the UK and US. The shift shows how established threat actors are adapting their tradecraft to reach more targets while reducing friction in the compromise process. [Read more via Microsoft Security]
Warlock Ransomware Exploits SharePoint in Critical-Infrastructure Attacks
Researchers reported that the China-linked Warlock ransomware group has continued exploiting Microsoft SharePoint vulnerabilities against organisations including a water utility, telecommunications provider, university and regional government body. Recent activity has focused on Portuguese- and Spanish-speaking targets across Europe, Africa and Latin America. The campaign reinforces how vulnerabilities in widely deployed collaboration platforms can provide an initial foothold into organisations whose disruption may have consequences far beyond traditional IT systems. [Read more via BleepingComputer]
Three in Four EU Employees Report Encountering Cyber Threats at Work
A new Eurobarometer survey found that three in four EU employees had encountered suspicious emails, messages or links in the workplace. Phishing was the most frequently reported threat at 39%, while employees also reported attempts to steal personal data or passwords, malware attacks and AI-generated scams. Although 83% recognised that cyberattacks could have serious consequences, only 48% said they could identify an AI-generated fake video. The findings reinforce the gap that can exist between general awareness and the ability to recognise increasingly convincing attacks in practice. [Read more via the European Commission]
✅ Regulatory & Policy Updates
Commission Proposes EU-Wide Secure Communication System for First Responders
The European Commission proposed the European Union Critical Communication System (EUCCS), designed to connect national communications used by police, firefighters, medical services and civil-protection organisations. The proposal aims to provide secure and resilient cross-border communications during emergencies, including situations where normal terrestrial infrastructure is unavailable. The proposed framework also includes requirements around resilience, separation from public communications services and ICT supply-chain security. [Read more via the European Commission]
EU Governments Consider More Flexible Timeline for Removing High-Risk Telecom Suppliers
EU governments are considering replacing a proposed fixed 36-month deadline for telecom operators to remove equipment from suppliers assessed as high risk. According to a draft reported by Reuters, the revised approach would consider factors including risk level, equipment lifecycle, interoperability, replacement cycles and the availability of alternatives. The proposal remains subject to negotiation and is part of wider discussions around the revised EU Cybersecurity Act and ICT supply-chain security. [Read more via Reuters]
✅ Cyber IQ Challenge + Proactive Security Hacks
Quick Quiz: A third-party company has legitimate access to query sensitive information in one of your organisation’s systems. Which control set provides the strongest protection against abuse of that access?
A) Trust the connection because the supplier has already passed due diligence
B) Review the supplier’s activity only during the annual security assessment
C) Restrict access to what is necessary, monitor query volumes and behaviour, alert on anomalies and maintain the ability to revoke access quickly
D) Require the supplier to confirm in writing that credentials will not be shared
(Answer below)
Smart Security Moves of the Week:
- Monitor trusted access continuously: Baseline normal supplier and partner activity and alert on unusual query volumes, automation or access patterns.
- Limit what external identities can reach: Apply least privilege and segmentation even where the organisation or connection is considered trusted.
- Harden collaboration platforms: Internet-facing SharePoint and similar systems should receive rapid vulnerability remediation and compromise assessment when active exploitation is reported.
- Strengthen phishing-resistant authentication: Reduce reliance on credentials alone and train employees to verify unexpected invitations, attachments and authentication requests.
- Prepare for large-scale data exposure: Ensure incident-response plans cover identity-fraud risks, affected-person communications and rapid coordination with regulators and law enforcement.
Answer: C) Restrict access to what is necessary, monitor query volumes and behaviour, alert on anomalies and maintain the ability to revoke access quickly.
Legitimate access does not guarantee legitimate use. Strong controls therefore need to address both who is authorised and how that authorisation is actually being used.
✅ Conclusion
This week’s developments reinforce that cybersecurity is not only about preventing the first point of entry. It is also about controlling what becomes possible once that entry exists.
A trusted supplier, an exposed platform or a compromised user should not automatically provide unrestricted reach into the wider environment. Resilience therefore depends on limiting privileges, monitoring behaviour, segmenting critical systems and retaining the ability to contain abnormal activity quickly.
The same principle applies beyond individual organisations. As European services become more dependent on shared technology providers and communications infrastructure, understanding and reducing those dependencies becomes part of cyber resilience itself.
Final reflection: If an attacker gained a foothold in your environment today, would you know how far they could reach and how quickly you could contain them?
At Make Sense, we help organisations translate cyber complexity into practical resilience across Europe’s evolving threat, technology and regulatory landscape.
Stay secure,
The Make Sense SRL Team & CyberTania
