Both the Russians and the Ukrainians claim that their emergency alert applications were hacked, causing people to receive false alarms.

Both Ukraine and Russia reported a cyberattack on their alert applications, which sent false nuclear threat warnings to users. Ukrainian authorities advised citizens to use alternative information sources, while the Russian ministry stated that their app is merely a supplementary service and is being fixed. Ukraine blamed Russia for the attack, while Moscow did not specify who might be behind the cyber assault. A Stanford researcher expressed concern over the breach of Ukraine's alert system, predicting similar incidents in the future. Ukraine faces challenging months ahead due to ongoing drone attacks and limited air defense resources.