Ukraine Knocked Out Key Yandex Data Centers. The Fallout Is Being Felt Across Russia.

TL;DR

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Meduza reported that strikes beginning October 8 damaged three of Yandex’s six data centers, halting operations at two and knocking out modules at a third. The disruption has affected Yandex services and other sites, while the company works to restore operations and move customer workloads to other providers. The full damage, recovery timeline and status of three supercomputers remain unclear.

Strikes have damaged three of Yandex’s six data centers, halting operations at facilities in Sasovo and Vladimir and knocking out several modules in Kaluga, according to Meduza’s October 12 report. The damage has disrupted Yandex services and other online services across Russia, with users in neighboring countries also reporting problems.

Meduza reported that the first attack on Yandex data centers took place on October 8. The company’s facilities in Sasovo, in the Ryazan region, and Vladimir were no longer operating, while several modules at its Kaluga site had been completely knocked out. The report said Ukraine described the strikes as a response to Russian attacks on Ukrainian data centers. The facilities are part of infrastructure Yandex calls its “iron heart.”

Users reported outages affecting Yandex Mail, Pay, Disk and Go, among other services, as well as the company’s cloud platform. The disruption extended beyond Yandex: Meduza cited reports of access problems involving the Vkusno i Tochka app, media websites, Pulkovo airport’s site and continuous glucose monitoring services. Users in Kyrgyzstan, Kazakhstan, Uzbekistan, Armenia, Belarus and Serbia also reported problems with Yandex apps, including difficulty ordering taxis and food.

Yandex said on October 11 that access to Alice, Search, Maps, Mail and other services had been restored, although some features remained unavailable. The company restricted downloads from Yandex Disk while engineers prioritized other services. It also arranged to move customer data and services to infrastructure run by VK Cloud, Selectel and K2Cloud. Meduza reported that as of October 12, Yandex had not restored full operations.

Outages Reach Beyond Yandex

The disruption matters because Yandex’s systems support consumer services as well as business customers’ cloud workloads. When those systems are unavailable, effects can extend to companies and public-facing services that rely on them, as the reported problems at websites and apps illustrate. Some Yandex Pay users said on social media that they could not access funds; Yandex said the funds were safe, but did not give a date for full restoration.

The strikes also raise questions about the resilience and cost of Russian digital infrastructure. Meduza cited analysts who warned that replacing damaged equipment could take about six months and be expensive. If companies spend more on protection, backup capacity and moving workloads, costs could rise for cloud customers. The extent of any lasting business impact has not been established.

Three supercomputers are located in the affected data centers and are used, among other purposes, to train Yandex’s artificial-intelligence models, Meduza reported. Their status is unknown. Their potential loss or prolonged unavailability could affect the company’s computing capacity, but no confirmed assessment of that impact was provided.

Three Sites Hit Since October 8

The strikes took place amid attacks on data centers in both countries. Meduza reported that Kyiv characterized its action as a response to Russian strikes on Ukrainian data centers. The report did not provide details independently establishing the circumstances of each attack, and the Kremlin had not commented on the strikes on Yandex as of October 12.

Yandex’s share price fell more than 7.6% after the first strikes, according to Meduza. The report also said Russia has more than 250 data centers, many in Moscow and nearby regions, and that other operators had begun taking protective measures, including buying equipment to guard against drones. The reported share-price move and industry preparations reflect immediate market and operational concerns, not a settled estimate of longer-term losses.

Russian officials responded publicly to the attacks. The country’s digital development minister called the attack “unprecedented,” and the ministry was discussing data-center protection with the Defense Ministry. The State Duma said companies themselves were responsible for protecting their data centers, according to Meduza.

“The company said users’ funds were safe.”

— Yandex

Damage and Recovery Still Unclear

The total damage and recovery schedule are not confirmed. Yandex had restored access to some services by October 11, but some features remained unavailable and the company had not returned all operations to normal by October 12. It was not clear when full service would resume, how much equipment must be replaced, or whether all damaged capacity can be rebuilt.

The status of the three supercomputers at affected sites also remained uncertain. Meduza cited an estimate of about six months to replace damaged equipment, but that is a forecast reported by the outlet, not a confirmed Yandex timetable. The extent of any long-term effects on cloud customers, AI work, prices or the company’s finances is also not yet known.

The report did not provide a detailed public accounting from Yandex of the incidents or independently verify every reported service disruption. The stated reduction in bot traffic was attributed to cybersecurity experts, but its measurement period and comparison baseline were not specified.

Restoration and Relocation Efforts

Yandex’s immediate priority, according to its service announcements and actions reported by Meduza, is restoring popular services and shifting customer data and workloads to other cloud providers. Users and business customers will be watching for updates on which features return, whether access is stable and how long restrictions on Yandex Disk downloads remain in place.

Further information from Yandex on the condition of the three sites, the supercomputers and the recovery timetable would clarify the scale of the disruption. Russian authorities are also discussing data-center protection, while other operators are reportedly preparing protective measures. Whether those steps will prevent further disruption, and whether added security spending will raise service prices, remains to be seen.

Key Questions

Which Yandex data centers were damaged?

Meduza reported damage at sites in Sasovo, Vladimir and Kaluga. Operations at the first two were halted, while several modules at the Kaluga facility were knocked out.

Which services were affected?

Users reported problems with Yandex Mail, Pay, Disk, Go and Yandex Cloud, among other services. Meduza also cited outages or access problems at unrelated apps and websites, including Vkusno i Tochka and Pulkovo airport’s site.

Are Yandex Pay users’ funds safe?

Yandex said users’ funds were safe after some customers reported being unable to access money. The company had not given a date for all payment functions to return, according to Meduza’s October 12 report.

When will Yandex services be fully restored?

No full-restoration date had been announced as of October 12, 2026. Yandex said it had restored access to several major services, while some features remained unavailable.

What is known about Yandex’s supercomputers?

Meduza reported that three supercomputers are located in the affected data centers and are used in part to train AI models. Their condition and availability had not been confirmed.

Source: rss