Russian-speaking threat actors – CyberSecurityBoard

Critical CVEs

Attackers Exploit Three Fortinet FortiSandbox Flaws, One Patched Last Week

Threat actors are actively exploiting three security vulnerabilities in Fortinet FortiSandbox, according to threat intelligence firm Defused Cyber. The flaws include CVE-2026-39813…

Active Directory AI-generated exploit command injection credential harvesting

June 25, 2026

Cyber News

CISA Warns Fortinet Customers as FortiBleed Campaign Compromises 86,644 FortiGate Devices

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent warning to Fortinet customers following the discovery of a widespread…

Arctic Wolf brute-force attack CISA credential stuffing

June 25, 2026

Attack Groups

Russian-Speaking Threat Actors Behind FortiBleed Campaign

Suspected Russian-speaking threat actors compromised over 30,000 Fortinet firewalls across 194 countries in a large-scale credential harvesting campaign dubbed FortiBleed. They used…

credential harvesting FortiBleed Fortinet Russian-speaking threat actors

June 25, 2026