InfoSecBulletin Cybersecurity for mankind

871 ransomware victims were recorded in April- 2026 while 88 group active in ransomware arena. In total the world sees a victims of 3263 in different sectors across the world. Top Threat Groups by Victim Count A new study of ransomware shows the top 10 threat groups that target the …

Key Points: The UK’s AI Security Institute (AISI) tested OpenAI’s GPT-5.5 and found it can perform cyberattacks like Anthropic’s Claude Mythos Preview. GPT-5.5 is the second model, after Mythos, to fully complete a complicated enterprise attack test. This was done on a network without any active defenses. AISI sees this …

Wazuh has fixed a critical issue dubbed CVE-2026-30893 which is rated 9.0 on the CVSS scale allowing an authenticated cluster peer to write arbitrary files outside the intended extraction directory on other cluster nodes. This can be escalated to code execution in the Wazuh service context by overwriting Python modules …