Cyber attacks against NATO and European targets have significantly increased in recent months, raising concerns about digital security in the region.
According to foreign media reports, a massive data leak of Russian origin has highlighted the scale of these attacks.
Among the targets were hundreds of emails belonging to prosecutors and officials in Ukraine, NATO countries, and the Balkans.
It is reported that 27 accounts of the Greek National Defense General Staff were targeted, although these were unclassified accounts and did not contain secret information.
Greek authorities clarified that classified communications use specialized systems with multiple security measures, and any incident is reviewed by relevant cybersecurity structures.
Meanwhile, the incident has also had repercussions in Romania, where dozens of Air Force emails were compromised.
The Romanian Ministry of Defense confirmed that the affected data was not classified and that the breach, discovered in March 2025, was isolated within 24 hours.
According to data, at least 284 email accounts were compromised during the period September 2024 – March 2026, although experts remain cautious about the final identification.
The situation has sparked renewed debate in the European Union about strengthening common cybersecurity and defense policies.
In Sweden, authorities declared they had prevented a pro-Russian cyber attack on a thermal power plant during 2025.
The Minister of Civil Defense, Carl-Oskar Bohlin, emphasized that these attacks aim to cause physical consequences as well, comparing them to the sabotage of critical infrastructure.
Swedish officials warned that threats have significantly increased since the start of the Russian invasion of Ukraine in 2022, signaling a continuous escalation of hybrid warfare in Europe.