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CISA confirms BlueHammer (CVE-2026-33825) is now used in ransomware attacks to gain SYSTEM privileges through Microsoft Defender. BlueHammer, tracked as CVE-2026-33825, has moved from proof-of-concept noise to real ransomware attacks in the wild, the US CISA confirms. BlueHammer allows attackers to escalate privileges locally in Microsoft Defender. The vulnerability, along with two other zero-days dubbed […]

Security Affairs 1 Jul 2026, 11:26 p.m. Incident · 2 stories Actively exploited CVE-2026-33825 Antivirus CISA CVE Flaw Microsoft PoC Ransomware Vulnerability Warning

DragonForce hid for months by routing malware traffic through Microsoft Teams infrastructure, masking C2 activity and evading network detection. DragonForce ransomware operators hit a major U.S. services firm and stayed hidden for one to two months by routing their command-and-control traffic through Microsoft’s own Teams relay servers. Symantec’s threat hunters tracked the custom backdoor they […]

Security Affairs 18 Jun 2026, 3:55 a.m. Incident · 5 stories America Antivirus Backdoor Command and Control Malware Microsoft Ransomware Symantec