Exploitation attempts against critical Atlassian flaw have begun (CVE-2026-21589)

Help Net Security reports active exploitation attempts against the critical Atlassian Data Center arbitrary file access vulnerability CVE-2026-21589 shortly after patches and a public proof of concept became available. The feed also covers an ongoing FortiBleed campaign targeting internet-facing Fortinet FortiGate firewalls and SSL VPN gateways, reportedly compromising tens of thousands of devices and locking administrators out. Additional items discuss AI security and resilience products, phishing response automation, endpoint threat hunting, and hijacked country-code domain registries usedтo