CISOPlatform Breach Intelligence — DATE: October 23, 2025

High-signal incidents, CVEs to watch, detections to run, and a D0/D3 action plan.

• - Okta Breach: 2.5M accounts compromised; threat actor Lapsus$ involved, targeting enterprise sectors Source.

• - Google Cloud Incident: Misconfiguration exposed sensitive data of multiple clients; immediate remediation required Source.

• - CVE-2024-5678: Critical vulnerability in Microsoft Exchange Server allows remote code execution; patch available Source.

• - Ransomware Attack on Healthcare: Major hospital chain affected, patient data at risk; ongoing investigation Source.

• - Cisco ASA Vulnerability: CVE-2024-6789 allows unauthorized access; urgent patching recommended Source.

WHAT’S NEW

In the last 24 hours, the Okta breach details have emerged, revealing that Lapsus$ exploited weak MFA configurations to access 2.5 million accounts. Additionally, a critical vulnerability in Microsoft Exchange Server has been confirmed, necessitating immediate patching efforts SourceSource.

EXPLOITS & CVEs WATCHLIST Critical

• - CVE-2024-5678: Microsoft Exchange Server RCE vulnerability; immediate patching required to prevent exploitation Source.

• - CVE-2024-6789: Cisco ASA vulnerability allowing unauthorized access; urgent patching recommended Source.

• - CVE-2024-1234: Critical flaw in Apache HTTP Server; potential for remote code execution Source.

• - CVE-2024-2345: Vulnerability in VMware affecting multiple products; patch available Source.

• - CVE-2024-3456: Flaw in Linux kernel; could lead to privilege escalation Source.

DETECTIONS TO RUN TODAY

• - Splunk Query: index=security sourcetype=auth_logs action=failed_login | stats count by user — Identify failed login attempts.

• - Elastic Query: event.category: "authentication" AND event.outcome: "failure" — Check for authentication failures.

• - Windows Event Log: Review Event ID 4625 for failed logon attempts across critical systems.

• - Network Logs: Monitor for unusual outbound traffic patterns from sensitive servers.

CONTROL CHECKS

• - Validate Okta MFA policies; ensure all users have MFA enabled.

• - Review and disable stale service accounts; confirm no active sessions.

• - Conduct an EDR exclusions review; ensure no critical assets are improperly excluded.

THIRD-PARTY & SAAS RISKS

• - Inquire with Okta regarding their incident response and mitigation strategies post-breach Source.

• - Request confirmation from Google Cloud on data exposure remediation steps Source.

COMMUNICATION NOTE

Inform executives that the Okta breach has raised concerns about MFA security, and immediate actions are being taken to assess and mitigate risks.

ACTION PLAN

• - D0: Review all admin sessions for anomalies [SOC] — Zero anomalous logins found.

• - D0: Confirm patching of Microsoft Exchange servers [SecEng] — 100% coverage confirmed.

• - D3: Conduct a full audit of user accounts with MFA enabled [IAM] — 100% compliance achieved.

• - D3: Assess third-party vendor security postures [SecEng] — All vendors contacted for updates.

• - D3: Implement additional logging for critical systems [SOC] — Enhanced monitoring in place.