Microsoft is currently investigating a service disruption affecting the Microsoft Defender portal, which has blocked numerous security professionals from accessing critical threat management tools. The issue, tracked under the identifier DZ1191468 in the Microsoft 365 admin center, sparked concerns early Tuesday as administrators reported timeouts and login failures when attempting to load the security dashboard.​ […] The post Microsoft Investigation Defender portal Issue That Blocking Users Access appeared first on Cyber Security News.

Security researchers at Nisos have identified a critical gap in insider threat detection: organizations often fail to correlate early behavioral anomalies with external intelligence sources, leaving meaningful warning signs buried beneath operational n…

Multiple Ukrainian hacktivist groups have launched an extensive spearphishing campaign targeting Russia’s critical aerospace and defence industries, according to a new threat intelligence report by Intrinsec. The coordinated attacks between June …

A sophisticated threat actor has been conducting a persistent phishing campaign against United States educational institutions since April 2025, leveraging the open-source Evilginx framework to bypass multi-factor authentication (MFA). The campaign, wh…