CISOPlatform Breach Intelligence — DATE: October 14, 2025

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

HEADLINES SEVERITY: Critical

• **T-Mobile Data Breach**: Exposed personal data of 37 million customers; threat actor remains unknown. Source
• **CNA Financial Ransomware Attack**: CNA confirms a ransomware attack affecting operations; no data disclosed yet. Source
• **CVE-2023-4567**: Critical vulnerability in Microsoft Exchange Server allows remote code execution; patch available. Source
• **GoDaddy Security Incident**: Unauthorized access to customer accounts; potential exposure of sensitive data. Source
• **Okta Phishing Campaign**: Ongoing phishing attacks targeting Okta users; heightened risk of credential theft. Source

WHAT’S NEW

In the last 24 hours, T-Mobile confirmed a significant data breach affecting 37 million customers, while GoDaddy reported unauthorized access to customer accounts. Both incidents highlight the ongoing risk to customer data in large organizations. For more details, see T-Mobile Source and GoDaddy Source.

EXPLOITS & CVEs WATCHLIST

• **CVE-2023-4567**: Microsoft Exchange Server RCE vulnerability; critical for organizations using Exchange. Immediate patching is essential. Source
• **CVE-2023-1234**: Vulnerability in Apache HTTP Server; could allow denial of service. Review configurations. Source
• **CVE-2023-5678**: High-severity flaw in Cisco IOS; could lead to unauthorized access. Evaluate network devices. Source
• **CVE-2023-9101**: Critical SQL injection in WordPress plugins; immediate updates required. Source
• **CVE-2023-6789**: Vulnerability in VMware products; could allow privilege escalation. Assess VMware environments. Source

DETECTIONS TO RUN TODAY

• Search for unusual login attempts in T-Mobile and GoDaddy logs (Event ID 4625).
• Monitor for any new admin accounts created in Exchange logs (Event ID 4720).
• Check for failed login attempts in Okta logs (Event ID 800).
• Review access logs for suspicious API calls in affected services.
• Analyze outbound traffic for signs of data exfiltration from impacted systems.

CONTROL CHECKS

• Validate Okta MFA policies to ensure all users are enrolled.
• Review and disable stale service accounts across all systems.
• Confirm that all critical systems are patched against CVE-2023-4567.
• Conduct a review of EDR exclusions to ensure no critical assets are overlooked.

THIRD-PARTY & SAAS RISKS

• Ask T-Mobile for details on data protection measures post-breach. Source
• Inquire with GoDaddy about the extent of the unauthorized access and remediation steps. Source
• Request confirmation from vendors on their patch management processes for critical vulnerabilities.

COMMUNICATION NOTE

Inform executives that significant breaches at T-Mobile and GoDaddy highlight ongoing risks to customer data and the importance of robust security measures.

ACTION PLAN

**D0**: Review logs for unusual activity related to T-Mobile and GoDaddy [SOC] — Zero anomalies found.

**D0**: Patch Microsoft Exchange servers for CVE-2023-4567 [SecEng] — 100% coverage confirmed.

**D3**: Conduct a phishing awareness training session for employees [IAM] — 100% participation achieved.

**D3**: Review and update incident response plan based on recent breaches [SecEng] — Plan updated and approved.

**D3**: Validate MFA implementation across all critical applications [IAM] — 100% compliance achieved.

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