# Ukraine and Russia emergency alert cyberattacks

> Developing situation record from CLSTR: https://clstr.news/situations/ukraine-and-russia-emergency-alert-cyberattacks
> Updated: 2026-11-03T13:45:31.000Z. Sources: 255. Developments: 2.

On November 1, 2026, cyberattacks targeted official emergency alert mobile applications in both Ukraine and Russia, resulting in the dissemination of false information to civilians.

In Ukraine, the “Air Alert” application issued approximately 122 erroneous notifications. These included false warnings regarding radiation risks, chemical attacks, street fighting in Kyiv, and the deployment of the Russian “Oreshnik” hypersonic missile. The Ukrainian Ministry of Digital Transformation temporarily disabled the system for maintenance following the breach. The Ukrainian Center for Strategic Communications attributed the hack to Russia, though some experts suggested it could involve militant hackers.

Simultaneously, Russia’s Ministry of Emergency Situations reported a massive cyberattack on its own mobile application. This attack led to the spread of false warnings, including messages regarding nuclear warheads. Russian officials stated that while the mobile app was affected, the broader national public alarm system remained functional.

Experts noted that these disruptions increase operational risks by depriving populations of reliable communication during critical moments. The incidents have prompted calls from international security agencies to diversify crisis communication methods beyond vulnerable digital platforms.

## Timeline

### 2026-11-03: Hackers trigger false nuclear and chemical alerts in Ukraine and Russia

Hackers breached official emergency alert apps in Ukraine and Russia, sending false messages regarding nuclear and chemical threats to citizens' mobile phones.

4 sources. https://clstr.news/cluster/hackers-trigger-false-nuclear-and-chemical-alerts-in-ukraine-and-russia

### 2026-11-01: Ukraine and Russia report cyberattacks on emergency alert apps

Cyberattacks targeted emergency alert apps in Ukraine and Russia, sending false warnings of nuclear, chemical, and missile threats to citizens' mobile devices.

253 sources. https://clstr.news/cluster/kyiv-air-alert-app-targeted-in-suspected-cyberattack

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Cite as: Ukraine and Russia emergency alert cyberattacks. CLSTR, https://clstr.news/situations/ukraine-and-russia-emergency-alert-cyberattacks