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60% of organizations rate their Microsoft 365 security as “established” or “advanced”, according to CoreView. Yet, 60% of those same organizations have experienced account compromise attacks. The Microsoft 365 attack surface is wide and unpredictable. …
Scammers are exploiting Microsoft 365 Direct Send to spoof internal emails targeting US firms bypassing security filters with…
Hackers are abusing the Microsoft 365 Direct Send feature to deliver phishing emails that bypass email security controls.
The post Microsoft 365 Direct Send Abused for Phishing appeared first on SecurityWeek.
Windows 365 Cloud PCs now come with new default settings aimed at preventing / minimizing data exfiltration and malicious exploits, Microsoft has announced. Windows 365 Cloud PCs are Azure (i.e., Windows 365 service)-hosted virtual Windows PCs the comp…
A dramatic escalation in phishing attacks leveraging Adversary-in-the-Middle (AiTM) techniques has swept across organizations worldwide in early 2025, fueled by the rapid evolution and proliferation of Phishing-as-a-Service (PhaaS) platforms. Sekoia re…
Aim Labs uncovers EchoLeak, a zero-click AI flaw in Microsoft 365 Copilot that allows data theft via email. Learn how this vulnerability enables sensitive information exfiltration without user interaction and its implications for AI security.
Microsoft recently patched CVE-2025-32711, a vulnerability that could have been used for zero-click attacks to steal data from Copilot.
The post ‘EchoLeak’ AI Attack Enabled Theft of Sensitive Data via Microsoft 365 Copilot appeared first o…
Enterprise cybersecurity giant Proofpoint is buying Germany-based Microsoft 365 security solutions provider Hornetsecurity.
The post Proofpoint to Acquire Hornetsecurity in Reported $1 Billion Deal appeared first on SecurityWeek.
Suspected Russian threat actors are using OAuth-based phishing attacks to get targets to grant them access to their Microsoft 365 (M365) accounts. “The primary tactics observed involve the attacker requesting victim’s supply Microsoft Autho…
Threat actors are abusing Microsoft 365 infrastructure in a BEC campaign, and target its users in two brand impersonation campaigns.
The post Microsoft 365 Targeted in New Phishing, Account Takeover Attacks appeared first on SecurityWeek.