Pursuant to the provisions of the Rules of the Ljubljana Stock Exchange and the valid legislation, Telekom Slovenije, d.d., Cigaletova ulica 15, Ljubljana, hereby publishes the following notification:

Telekom Slovenije has detected a cyber incident in which certain internal business data were exposed. All necessary measures to contain and stop the incident, and to preventing it from continuing and spreading, were taken immediately.

The breach occurred in the support system for incident management and error resolution. Telekom Slovenije would like to emphasise that there was no breach of any databases that store the data related to our customers or their communications.

Telekom Slovenije is cooperating with the relevant authorities and cybersecurity experts to fully investigate the incident. Due to the interests of the investigation, we cannot disclose any details at this time.

This announcement will also be available on the website of Telekom Slovenije, d.d. (www.telekom.si),) for at least 5 years from the date of publication.