Executive Summary
In June 2024, the Cybersecurity Information Sharing Act (CISA) is poised to expire, potentially removing crucial liability protections that allow private and public entities to exchange cyber threat intelligence without fear of legal repercussions. If congressional reauthorization is not enacted, organizations may retreat from collaborative defense, risking increased exposure to sophisticated cyber threats like AI-driven attacks, ransomware, and advanced nation-state intrusions such as the recent Salt Typhoon telecommunications incidents. The expiration signals a return to pre-2015 conditions, where fear of litigation fostered information silos and hindered a unified defensive posture.
This situation is particularly urgent given today’s rapidly evolving threat landscape, marked by automated attacks, cloud-scale lateral movement, and the surge of machine-driven identities. The outcome will shape both regulatory priorities and operational risk management for sectors relying on timely, actionable intelligence sharing.
Why This Matters Now
CISA’s expiration creates an immediate legal vacuum that could deter cyber threat intelligence sharing across sectors, fundamentally weakening national cyber resilience during a period of heightened adversary activity and technological complexity. Prompt legislative action is required to sustain collaborative defenses and protect critical infrastructure.
Attack Path Analysis
An attacker initially exploited weak network segmentation or unencrypted communications to gain a foothold in a cloud-connected environment, possibly via exposed infrastructure or supply chain compromise. They leveraged insufficient identity or access controls to escalate privileges, obtaining broader administrative access. The threat actor moved laterally across east-west cloud traffic, taking advantage of insufficient segmentation and lack of workload isolation. They established command and control using covert outbound channels, possibly utilizing unmonitored egress or encrypted traffic. Sensitive data was exfiltrated via unfiltered outbound connections, potentially bypassing weak egress controls. Finally, the attacker deployed disruptive or destructive actions such as ransomware or data manipulation, impacting operations and resiliency.
Kill Chain Progression
Initial Compromise
Description
The attacker gained access by exploiting exposed networks, unencrypted traffic, or supply chain vectors within a hybrid or multi-cloud environment.
MITRE ATT&CK® Techniques
Valid Accounts
Application Layer Protocol
Phishing
Remote Services
Command and Scripting Interpreter
Modify Authentication Process
Data Encrypted for Impact
Exfiltration Over C2 Channel
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Monitoring and Responding to Security Events
Control ID: 10.7.2
NYDFS 23 NYCRR 500 – Notice of Cybersecurity Events
Control ID: 500.17
DORA (Digital Operational Resilience Act) – ICT-related Incident Reporting
Control ID: Art. 11
CISA Zero Trust Maturity Model 2.0 – Data Collection and Sharing
Control ID: Visibility and Analytics
NIS2 Directive – Cybersecurity Risk Management Measures
Control ID: Article 21
HIPAA Security Rule – Security Incident Procedures
Control ID: 164.308(a)(6)
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Telecommunications
CISA expiration eliminates legal protections for sharing Salt Typhoon intelligence, exposing telecom infrastructure to nation-state attacks without collaborative defense mechanisms.
Banking/Mortgage
Financial institutions lose liability protections for threat intelligence sharing, creating legal exposure when coordinating responses to nation-state campaigns and sophisticated attacks.
Health Care / Life Sciences
Healthcare organizations face compromised medical records and system-wide risks without CISA protections enabling secure sharing of ransomware and breach intelligence.
Government Administration
Federal agencies lose critical private sector intelligence flows, undermining national cybersecurity coordination amid AI-powered attacks and cybercrime-as-a-service proliferation.
Sources
- Expired protections, exposed networks: The stakes of CISA’s sunsethttps://cyberscoop.com/cybersecurity-information-sharing-act-expiration-date/Verified
- Cybersecurity Information Sharing Act of 2015 Lapseshttps://www.mayerbrown.com/en/insights/publications/2025/10/cybersecurity-information-sharing-act-of-2015-lapsesVerified
- CISA 2015 Has Sunset. Now What?https://www.dwt.com/blogs/privacy--security-law-blog/2025/10/cybersecurity-information-sharing-act-expiresVerified
- Cybersecurity Information Sharing Act of 2015 Authorities Lapsehttps://www.publicpower.org/periodical/article/cybersecurity-information-sharing-act-2015-authorities-lapseVerified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Implementing Zero Trust segmentation, encrypted traffic controls, egress policy enforcement, and anomaly detection would have greatly reduced the attack surface, limited lateral movement, detected anomalous actions in real time, and prevented or alerted on data exfiltration or business disruption attempts across cloud and hybrid environments.
Control: Encrypted Traffic (HPE)
Mitigation: Intercepted unauthorized access attempts and blocked data interception on unencrypted links.
Control: Zero Trust Segmentation
Mitigation: Limited the blast radius of compromised accounts and enforced least privilege.
Control: East-West Traffic Security
Mitigation: Detected and blocked unauthorized internal movement.
Control: Cloud Firewall (ACF)
Mitigation: Identified and blocked known malicious outbound C2 channels.
Control: Egress Security & Policy Enforcement
Mitigation: Prevented unauthorized data transfers to external destinations.
Real-time detection and rapid response to disruptive attacker behaviors.
Impact at a Glance
Affected Business Functions
- Cybersecurity Operations
- Legal Compliance
- Risk Management
Estimated downtime: 30 days
Estimated loss: $5,000,000
The expiration of the Cybersecurity Information Sharing Act of 2015 has led to reduced information sharing between private entities and the federal government, increasing the risk of undetected cyber threats and potential data breaches.
Recommended Actions
Key Takeaways & Next Steps
- • Deploy encrypted traffic controls (e.g., HPE/MACsec/IPsec) to secure all data in transit across hybrid and multi-cloud networks.
- • Enforce Zero Trust segmentation and least privilege policies to isolate identities, workloads, and sensitive data from lateral attacker movement.
- • Implement multi-cloud, centralized visibility and monitoring for rapid threat detection and cross-environment policy management.
- • Strictly govern outbound and egress connectivity with robust firewalling, FQDN filtering, and policy-based controls to prevent exfiltration and C2 communication.
- • Enable continuous anomaly detection and automated incident response to proactively identify and contain disruptive behaviors like ransomware or privilege misuse.
