Outages can disrupt security tools and critical services, showing how failures in infrastructure, vendors, or recovery plans affect cyber resilience.
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Background for this topic.
Outage is a period when a system, network, application, or online service is unavailable or cannot perform its intended function. It may be planned maintenance or an unplanned disruption caused by equipment or software failure, misconfiguration, a dependency problem, natural hazards, or a denial-of-service attack. The tag generally concerns availability incidents, not every performance issue or security breach.
For security practitioners, an outage requires determining whether malicious activity contributed to the disruption while preserving relevant logs, network telemetry, and system state for investigation. Defenses include capacity planning, segmented and redundant architecture, tested failover and recovery procedures, and controls that limit the effect of DDoS traffic or compromised dependencies. Emergency changes made during recovery should be authorized and recorded, since they can create new vulnerabilities or affect data integrity. Clear incident ownership and communications help coordinate technical response without obscuring the cause or scope.
Microsoft is investigating an ongoing outage blocking Microsoft 365 administrators with business or enterprise subscriptions from accessing the admin center. [...]
Kerberoasting gives attackers offline paths to crack service account password, without triggering alerts. Learn from Specops Software how to protect your Active Directory with stronger SPN password policies and reduced attack surfaces. [...]
The Lumma infostealer malware operation is gradually resuming activities following a massive law enforcement operation in May, which resulted in the seizure of 2,300 domains and parts of its infrastructure. [...]