Lithuania Probes Massive Data Leak Exposed 600,000 Records

On Friday, the Lithuanian General Prosecutor’s Office disclosed that more than 600,000 national-register entries were accessed without authorization. The breach involved real-estate and legal-entity databases and used login credentials of authorized institutions.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

Lithuania, a 2.9 million-person nation, is a frequent target of Russia’s hybrid-war tactics, including sabotage, arson, influence operations and cyber attacks. Days before the breach, drone activity near the Belarus border prompted alerts in Vilnius, underscoring broader security concerns.

Euronews

Key figures are Adrijus Jusas, head of the State Enterprise Centre of Registers who resigned; Defence Minister Robertas Kaunas, who warned of a new security reality; opposition politician Laurynas Kasciunas, who alleged Russian involvement; and the Lithuanian General Prosecutor’s Office, leading the probe.

Euronews

• 23 May 2026 (Friday) – Unauthorized access detected and Prosecutor’s Office publicly announced the breach.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

• 24 May 2026 (Sunday) – Opposition politician Laurynas Kasciunas posted speculation of Russian intelligence involvement on social media.

Euronews

• 26 May 2026 (Monday) – Adrijus Jusas submitted resignation.

Lithuania probes foreign role in major data leak of 600,000 national records

• 26 May 2026 onward – Authorities blocked suspected accounts and mandated credential updates.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

The breach exposed over 600,000 entries from real-estate and legal-entity registers; Lithuania’s population is 2.9 million, and the compromised registers hold property ownership and corporate registration data.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

The General Prosecutor’s Office said a foreign country is suspected of involvement, without naming a state. The government blocked compromised accounts, required credential updates and raised the cyber-alert level. Defence Minister Robertas Kaunas warned the breach shows a new reality for Baltic states and urged adaptation. European Commission President Ursula von der Leyen will meet Baltic leaders in Vilnius to discuss a coordinated EU response.

Euronews

Opposition politician Laurynas Kasciunas suggested the data theft is thought to be a Russian intelligence operation and warned that addresses of intelligence officers, military personnel, diplomats or politicians may have been accessed, potentially enabling surveillance or pressure.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

No official attribution has been confirmed; speculation points to Russia, but the prosecutor’s office has not identified a specific actor. The full extent of personal data beyond property and corporate records remains unclear, and investigators have not disclosed the timeline for identifying the perpetrators.

Lithuania investigates possible foreign involvement in major data leak of 600,000 national register entries

• “this is the new reality of what the Baltic states face”. — Robertas Kaunas, Defence Minister

Euronews

• “We need to adapt because the possibility of repeated similar scenarios is very high,” — Robertas Kaunas, Defence Minister

Euronews

• “While authorities did not specify which nation they suspect, opposition politician Laurynas Kasciunas wrote on social media on Sunday that the data theft is thought to be a Russian intelligence operation.”. — Laurynas Kasciunas, opposition politician

Euronews

• “Kasciunas warned that addresses of intelligence officers, military personnel, diplomats or politicians may have been accessed, which could potentially allow the perpetrators to spy on or exercise pressure against the targets.”. — Laurynas Kasciunas, opposition politician

Euronews

Lithuanian authorities continue forensic analysis of the breach, while enhancing network defenses and monitoring for further hybrid threats. The forthcoming meeting with EU leaders aims to align cybersecurity strategies across the Baltic region and to explore possible sanctions or diplomatic actions pending the investigation’s outcome.

Euronews