Habr•November 13, 2026•🇷🇺Translated from Russian

FirstVDS Announces Compensation After VMmanager 6 Zero-Day Breach

FirstVDS has published details on compensation for customers impacted by the October 17 incident involving the VMmanager 6 virtualization platform.

Following the breach, many clients had to urgently change passwords and keys, audit their systems, and restore access. Management restrictions on servers and prolonged support response times complicated recovery efforts.

Compensation Measures

  • Recalculation for unavailable services: Customers whose paid servers were not provisioned or remained inaccessible due to the incident should contact support via the personal account, specifying the server and approximate downtime period. Existing tickets can be updated instead of creating new ones.
  • Support wait bonus: Clients who waited more than 12 hours for the first support response may receive an account balance certificate. The bonus amount depends on the longest recorded wait time. Only requests submitted between October 17 and November 10, 2026 inclusive qualify. The certificate can be used once.

No compensation will be provided for data compromise or expenses related to changing passwords, keys, and tokens.

On October 18, 2026, FirstVDS disclosed that attackers had gained access to part of its network infrastructure and data of certain clients through a vulnerability in VMmanager 6, a product from ISPsystem (part of Astra Group).

By October 21, company engineers completed their internal technical review without waiting for the vendor's results. ISPsystem confirmed the vulnerability had been closed. On October 23, FirstVDS noted that client servers were operational, though management functions could experience reduced performance.

Later in October, ISPsystem revealed that the zero-day attack targeted one build of VMmanager 6 Hosting used by hosting providers for automated virtual machine provisioning in open environments. Exploitation succeeded due to a previously unknown flaw combined with Nginx behavior that permitted such requests. The vendor issued security updates, redesigned protective architecture, and conducted infrastructure reviews together with Kaspersky Incident Response and Kaspersky Threat Research specialists.

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