---
title: "Salt Typhoon telecommunications campaign"
description: "What the retained public evidence establishes about the Salt Typhoon incident, its attack path, impact, and response."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-09-19"
canonical_url: "https://www.ally.security/incidents/salt-typhoon-telecommunications-campaign-2024"
markdown_url: "https://www.ally.security/incidents/salt-typhoon-telecommunications-campaign-2024.md"
stix_url: "https://www.ally.security/incidents/salt-typhoon-telecommunications-campaign-2024/stix.json"
---

# Salt Typhoon telecommunications campaign

Chinese state-linked breach of major US telecom carriers (AT&T, Verizon, others). Accessed law-enforcement wiretap request systems and call metadata of high-value targets.

Last modified Sep 19, 2026 · 1 source

## Summary

- **Environment:** Telecom
- **Operational impact:** Accessed law-enforcement wiretap request systems and call metadata of high-value targets
- **Financial impact:** No financial figure is established by the reviewed source evidence

## What happened

In 2024–2025, Salt Typhoon experienced an incident in its telecom environment. The retained source describes the attack path as follows: Chinese state-linked breach of major US telecom carriers (AT\&T, Verizon, others). [1](#source-1)

The documented consequence was: Accessed law-enforcement wiretap request systems and call metadata of high-value targets. [1](#source-1)

## Impact

- Documented impact: Accessed law-enforcement wiretap request systems and call metadata of high-value targets. [1](#source-1)
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

## Timeline

### December 4, 2024 — Documented public update

The [Enhanced visibility and hardening guidance for communications infrastructure](https://www.cisa.gov/resources-tools/resources/enhanced-visibility-and-hardening-guidance-communications-infrastructure) records the incident facts used in this briefing. [1](#source-1)

### September 19, 2026 — Briefing updated

This briefing was last reviewed and updated on September 19, 2026.

## Threat Group & Attack Vector

The retained source describes the attack path as follows: Chinese state-linked breach of major US telecom carriers (AT\&T, Verizon, others). The canonical record does not add intrusion steps beyond those supported by the source. [1](#source-1)

### Actors

- No threat actor group has been identified in the reviewed public evidence.

### TTPs

- No specific MITRE ATT\&CK technique is currently mapped for this case.

## Response

The reviewed source does not describe containment, notification, or restoration steps in enough detail to summarize them responsibly.

This account is bounded to [Enhanced visibility and hardening guidance for communications infrastructure](https://www.cisa.gov/resources-tools/resources/enhanced-visibility-and-hardening-guidance-communications-infrastructure). Details absent from that evidence are left unresolved rather than inferred. [1](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/salt-typhoon-telecommunications-campaign-2024/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Enhanced visibility and hardening guidance for communications infrastructure

advisory · CISA

<https://www.cisa.gov/resources-tools/resources/enhanced-visibility-and-hardening-guidance-communications-infrastructure>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Resulted In · 84% confidence · current**  
   Salt Typhoon telecommunications campaign: Accessed law-enforcement wiretap request systems and call metadata of high-value targets.
2. **Resulted In · 100% confidence · current**  
   Salt Typhoon telecommunications campaign: The reviewed source documents the salt typhoon telecommunications campaign involving Salt Typhoon.
3. **Occurred At · 100% confidence · current**  
   Documented public update: 2024-12-04
4. **Resulted In · 84% confidence · current**  
   Salt Typhoon telecommunications campaign: Chinese state-linked breach of major US telecom carriers (AT&T, Verizon, others).

</details>