Espreso. Global

Ukraine's major mobile operator reports hacker attack

12 December, 2023 Tuesday
15:30

On the morning of December 12, users of Kyivstar, the largest Ukrainian mobile operator, lost mobile service due to the failure. Also, users cannot switch to another operator through national roaming. The company says the breach was caused by a powerful hacker attack

Espreso TV reported the information.

In the morning, users noticed that when they tried to log in to Kyivstar's website, they got an error, the page was down.

In addition, users complained about the lack of mobile service and the Internet. It is also impossible to log in to the Kyivstar mobile application.

When trying to make a call, users hear the response "the mobile network is unavailable.”

Kyivstar’s response

The company confirmed a technical failure in the network, which resulted in the disruption of services and Internet access for part of the user base. They emphasized that the company's specialists are working to fix the problem. 

Around 1:00 p.m., the operator's press service reported that the large-scale breach was caused by a powerful hacker attack.

"This morning we became the target of a powerful hacker attack. It caused a technical failure, which temporarily made mobile and Internet services unavailable," the company said in a Facebook post. 

It also added that representatives of law enforcement agencies and special government services were involved to record the circumstances and consequences of the unlawful interference with the network. Specialists are working to eliminate the consequences to restore communication as soon as possible.

Kyivstar emphasized that no personal data of its subscribers has been compromised. In addition, the mobile operator promises to compensate subscribers who had no service or could not use their systems.

  • In October, Kyivstar warned users that its information systems had detected an SMS campaign encouraging Ukrainians to commit treason.

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