A zero-day authentication bypass vulnerability in Ivanti software was exploited to carry out an attack on the Norwegian Ministries Security and Service Organization.

The attack affected communications networks at 12 Norwegian government ministries, according to the original statement, preventing employees in those departments from accessing mobile services and email.

The government noted that the Prime Minister’s office, the Ministry of Defense, the Ministry of Justice and Emergency Preparedness, and the Ministry of Foreign Affairs were not impacted.