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Under Active Attack

Executive Summary

The Salt Typhoon campaign represents one of the most significant nation-state espionage operations against U.S. telecommunications infrastructure, attributed to Chinese threat actors who infiltrated major telecom carriers including Verizon, AT&T, and T-Mobile. Beginning in 2022 and persisting through 2024, the attackers gained deep access to telecommunications networks, intercepting communications from high-profile political figures including presidential candidates, and accessing sensitive customer data and call records. The breach exposed critical vulnerabilities in telecom infrastructure security and prompted bipartisan legislative action to establish mandatory cybersecurity standards for the telecommunications sector.

This incident highlights the urgent need for Zero Trust network segmentation and encrypted communications as nation-state actors increasingly target critical infrastructure. The persistence and scope of Salt Typhoon demonstrate how traditional perimeter-based security models fail against sophisticated adversaries who can maintain long-term access to compromise sensitive communications and national security information.

Why This Matters Now

Nation-state attacks on telecommunications infrastructure are accelerating, with Chinese threat actors maintaining persistent access to U.S. networks. The bipartisan Senate response demonstrates the critical need for immediate Zero Trust implementation to prevent ongoing espionage campaigns.

Attack Path Analysis

MITRE ATT&CK® Techniques

Potential Compliance Exposure

Sector Implications

Sources

Frequently Asked Questions

Salt Typhoon was a Chinese nation-state campaign that infiltrated major U.S. telecom carriers including Verizon, AT&T, and T-Mobile, accessing communications from presidential candidates and sensitive customer data over multiple years.

Cloud Native Security Fabric Mitigations and ControlsCNSF

Based on the attack progression modeled above, these are the defensive controls that would constrain each stage.

Aviatrix Zero Trust CNSF would likely reduce the attack surface and constrain lateral movement across telecommunications infrastructure by implementing network segmentation and identity-aware access controls. The segmented architecture could limit attacker reachability between carrier networks and reduce the blast radius of the compromise.

Initial Compromise

Control: Cloud Native Security Fabric (CNSF)

Mitigation: Initial network access may have been constrained through unified security policy enforcement and continuous monitoring of network entry points across the telecommunications infrastructure.

Privilege Escalation

Control: Zero Trust Segmentation

Mitigation: Privilege escalation attempts could be limited through identity-based access controls and microsegmentation that restricts administrative access to critical telecommunications infrastructure and lawful intercept systems.

Lateral Movement

Control: East-West Traffic Security

Mitigation: Lateral movement between carrier networks and geographic regions would likely be constrained through network segmentation and traffic inspection that limits east-west communication paths across telecommunications infrastructure.

Command & Control

Control: Multicloud Visibility & Control

Mitigation: Command and control communications may have been detected and disrupted through comprehensive network visibility and traffic analysis across the distributed telecommunications infrastructure spanning multiple carriers.

Exfiltration

Control: Egress Security & Policy Enforcement

Mitigation: Data exfiltration could be constrained through controlled egress policies and traffic inspection that limits unauthorized outbound data flows from telecommunications systems containing sensitive communications records.

Impact (Mitigations)

While sensitive communications may still be exposed, the overall impact could be reduced through limited attack surface and constrained lateral movement that reduces the total scope of compromised telecommunications infrastructure.

Impact at a Glance

Affected Business Functions

  • Telecommunications Network Operations
  • Customer Data Management
  • Government Communications Services
  • Critical Infrastructure Communications
Operational Disruption

Estimated downtime: N/A

Financial Impact

Estimated loss: N/A

Data Exposure

The Salt Typhoon campaign involved sophisticated espionage targeting major US telecommunications carriers, resulting in unauthorized access to communications data from presidential campaigns, political candidates, and other high-value targets. The scope included potential access to call records, text messages, and other sensitive communications metadata across multiple major telecom providers.

Recommended Actions

  • • Implement encrypted traffic controls using HPE capabilities to protect data in transit across all telecommunications infrastructure and prevent interception of unencrypted communications
  • • Deploy zero trust segmentation with identity-based policies to limit lateral movement within telecom networks and restrict access to critical lawful intercept systems
  • • Establish comprehensive east-west traffic security monitoring to detect and prevent unauthorized lateral movement between network segments and carrier infrastructure
  • • Implement multicloud visibility and control capabilities to gain centralized observability into network traffic patterns and detect anomalous interactions across telecommunications infrastructure
  • • Deploy egress security and policy enforcement to monitor and control outbound data flows, preventing unauthorized exfiltration of sensitive communications data

Secure the Paths Between Cloud Workloads

A cloud-native security fabric that enforces Zero Trust across workload communication—reducing attack paths, compliance risk, and operational complexity.

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