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Major corporations' Fortinet firewalls targeted in large-scale cyber-espionage campaign

Executive summary: Cybercriminals allegedly infiltrated tens of thousands of Fortinet firewalls used by major global companies, potentially gaining access to internal networks. The breach threatens data integrity and operations of high‑profile enterprises, underscoring risks in widely deployed network security appliances.

Who is involved: Fortinet firewall customers worldwide; alleged Russian-speaking hacking group; cybersecurity authorities.

Likely next: Companies will likely accelerate patching, conduct forensic reviews, and may face regulatory inquiries or class‑action litigation.

An alleged Russian-speaking cybercriminal group is reported to have compromised tens of thousands of Fortinet firewall devices used by leading enterprises worldwide, exploiting default or weak passwords. The incident highlights persistent vulnerabilities in critical network perimeter hardware. No public attribution beyond the group's known tactics has been confirmed. Authorities and affected firms are expected to initiate forensic investigations and patching efforts.

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