Russian technology company Yandex is experiencing widespread service disruptions after drone attacks damaged three of its data centers, leaving some customers unable to access files, backups, and cloud-based applications.
The incidents occurred between October 8 and October 11, affecting facilities in Sasovo, Kaluga and Vladimir. Yandex confirmed that the attacks caused significant physical damage, forcing two data centers to shut down completely while a third continues operating with reduced capacity.
The first attack struck the Sasovo facility on October 8, followed by damage to the Kaluga data center the next day. A third incident on October 11 forced the closure of the company’s facility in Vladimir. No injuries were reported.
The attacks have been attributed to Ukrainian forces, which have expanded strikes against Russian infrastructure during the ongoing war. The affected facilities support services used by individuals, businesses and other organizations across Russia.
Yandex operates one of the country’s largest technology ecosystems, providing search, email, cloud storage, artificial intelligence and business infrastructure services. Its cloud platform hosts applications, databases and virtual servers for numerous customers.
The disruption has affected several Yandex Cloud products, including computing resources, databases and security services. Some services remain partially available, while others have experienced performance problems or complete outages.
Users of Yandex Disk have also reported difficulties accessing previously uploaded documents and backups. One customer described missing file previews, failed downloads, and repeated server errors when attempting to retrieve stored information.
Yandex has warned that its remaining infrastructure is operating under unstable conditions. The company placed its cloud platform in emergency mode and advised customers to activate alternative disaster recovery arrangements wherever possible.
Although some cloud management tools and storage services remain accessible, the company has acknowledged that technical support channels may also experience interruptions.
Yandex engineers are working to maintain available services and restore damaged infrastructure. However, the company has not provided a reliable timeline for returning all affected systems to normal operation.
The damage could also create longer-term challenges. Russian industry sources have warned that replacing specialized data center equipment may take several months because of limited availability and difficulties obtaining hardware.