WATCH: Zelenskyy confirms Ukraine hacked back after Russia's cyberattack of its emergency alert system - PBS

The Russian operation against the Ukrainian emergency alert system was not fully controlled and was exploited to broadcast false threat messages, according to the report. The intrusion into the alert system was a deliberate act by Russian forces.

In response to the incident, President Zelenskyy stated that Ukraine had hacked Russian forces. The president confirmed that Ukraine carried out a cyberattack in retaliation for the earlier event.