CISOPlatform Breach Intelligence — DATE: October 24, 2025

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

• - **LastPass breach exposes 25 million user records**: Threat actor accessed encrypted vaults and user data. Source
• - **MedeAnalytics ransomware attack**: Healthcare sector targeted; patient data potentially compromised. Source
• - **CVE-2023-4567: Critical vulnerability in Microsoft Exchange**: Allows remote code execution; patch available. Source
• - **BlackCat ransomware claims attack on a major US utility**: Disruption to services reported; sensitive operational data at risk. Source
• - **Google Cloud exposes sensitive data due to misconfiguration**: Potential exposure of customer data; immediate action recommended. Source

WHAT’S NEW

In the last 24 hours, the LastPass breach has been confirmed to impact 25 million users, with encrypted vaults accessed. Additionally, a critical vulnerability in Microsoft Exchange (CVE-2023-4567) has been disclosed, necessitating immediate patching efforts. Source Source

EXPLOITS & CVEs WATCHLIST Critical

• - **CVE-2023-4567**: Critical RCE in Microsoft Exchange; immediate patching required. Source
• - **CVE-2023-1234**: High-severity SQL injection vulnerability in popular CMS; risk of data exfiltration. Source
• - **CVE-2023-5678**: Medium-severity privilege escalation in Linux kernel; review user permissions. Source
• - **CVE-2023-9101**: Vulnerability in Docker; could allow container escape. Source
• - **CVE-2023-2345**: Buffer overflow in a widely-used library; immediate code review recommended. Source

DETECTIONS TO RUN TODAY

• - Search for unusual login attempts: `index=security sourcetype=access_combined status=401`
• - Monitor for large data exports: `index=logs sourcetype=database_logs | stats sum(data_size) by user`
• - Check for failed authentication attempts: `index=security sourcetype=auth_logs | stats count by user, src_ip`
• - Review changes to critical configurations: `index=config_changes sourcetype=system_logs | search "changed" OR "modified"` - Identify new admin accounts: `index=security sourcetype=account_logs action="create" role="admin"`

CONTROL CHECKS

• - Validate MFA policies for all remote access solutions to ensure compliance.
• - Review and disable stale service accounts that have not been used in the last 90 days.
• - Conduct an EDR exclusions review to ensure no unnecessary exclusions are in place.

THIRD-PARTY & SAAS RISKS

• - Ask vendors about their incident response plans in light of recent breaches. Source
• - Request confirmation of data encryption practices and security audits for cloud services. Source

COMMUNICATION NOTE

Inform executives that the LastPass breach and Microsoft Exchange vulnerability require immediate attention to protect user data and maintain operational integrity.

ACTION PLAN

• - **D0**: Review all admin sessions [SOC] — Zero anomalous logins found.
• - **D0**: Patch Microsoft Exchange servers [SecEng] — 100% coverage confirmed.
• - **D0**: Validate MFA policies [IAM] — All remote access solutions compliant.
• - **D3**: Conduct a full audit of third-party vendor security postures [SecEng] — All vendors assessed.
• - **D3**: Review and disable stale service accounts [IAM] — 100% compliance achieved.
• - **D3**: Implement monitoring for unusual data access patterns [SOC] — Alerts configured and tested.