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U.S., Canadian and Singaporean authorities have reported cyber-espionage operations against telecommunications providers. Their public accounts describe access to telecom systems and, in the U.S. case, theft of call-record data and compromise of some private communications. They do not establish that the intrusions specifically targeted 5G networks or exploited 5G technology.
What did the reported intrusions access?
The reports describe different operations in different countries, with different actors and documented effects. They should not be treated as one campaign or as evidence that every provider experienced the same activity.
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| Case | What authorities reported | Important scope limit |
|---|---|---|
| United States | On 13 November 2024, the FBI and CISA said PRC-affiliated actors compromised multiple telecommunications companies. The agencies reported theft of customer call-record data, compromise of private communications belonging to a limited number of people—primarily people involved in government or political activity—and copying of some information subject to U.S. law-enforcement requests pursuant to court orders. | The agencies distinguished call-record data from private communications. Their statement does not say that all customers’ calls or messages were accessed. |
| Canada | The Canadian Centre for Cyber Security reported that three network devices registered to a Canadian telecommunications company were compromised in mid-February 2025. It assessed that likely Salt Typhoon actors exploited CVE-2023-20198 to retrieve running configurations. At least one device’s configuration was modified to create a GRE tunnel for collecting network traffic. | The report does not establish that all three devices were configured to collect traffic. The attribution is expressed as likely, not certain. |
| Singapore | In a report published 9 February 2026, Singapore’s Cyber Security Agency (CSA) said UNC3886 targeted all four major operators: M1, SIMBA Telecom, Singtel and StarHub. CSA described a zero-day firewall bypass and rootkit use. | CSA said it had no evidence to date of customer-record access or exfiltration, or of telecom service disruption. It did report unauthorized access to some systems, including limited access to critical systems in one instance. |
The Singapore operation is a separate case from the Salt Typhoon reporting about U.S. and Canadian telecoms; the names refer to different actor designations in the respective agency accounts.
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Telecom providers carry communications and hold data about communication, location and devices. The Canadian Centre for Cyber Security says state actors have persistently targeted providers for bulk data and high-value intelligence collection. Access to a provider’s network can therefore create intelligence opportunities that are not limited to reading message content.
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Perimeter equipment—including routers, firewalls and VPN solutions—can be a useful foothold. The Canadian Centre notes that a compromise may allow an actor to observe or modify traffic, exfiltrate information, or move further into a network. These are sector-level risks, not proof that every capability was used in each reported incident. In Canada, the specific confirmed technical detail was retrieval of device configurations and the creation of a GRE tunnel on at least one device.
Were these attacks specifically about 5G?
The agency reporting described here concerns telecommunications infrastructure generally. It does not establish that attackers breached 5G radio access networks, targeted 5G core functions, or exploited a vulnerability specific to 5G. A telecom provider may operate multiple generations of technology and other network systems; targeting a provider alone does not show which generation or function was involved.
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Accordingly, “5G-related” is not a confirmed technical description of these cases. The supported conclusion is that telecom networks were targeted for espionage, while a direct 5G connection remains unestablished in the cited official accounts.
What did Singapore’s investigation find—and not find?
CSA’s account of Operation CYBER GUARDIAN describes an extended response to the UNC3886 activity: the operation lasted more than eleven months and involved over 100 cyber defenders across agencies. CSA said remediation and expanded monitoring had been implemented. Its statement that investigators had found no evidence of customer-record access or service disruption is time-bound to the 9 February 2026 report; it is not proof that access could never have occurred.
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Singapore Minister for Digital Development and Information Josephine Teo said: “Your actions, or inaction, can determine whether we succeed or fail in protecting our critical infrastructure, and our national security. I urge all of you to continue investing in upgrading your systems as well as your capabilities”.
Quick Recap
What can readers conclude?
- Authorities have documented espionage-oriented access to telecom companies, with specific data theft and communications compromise reported by U.S. agencies.
- The Canadian account provides a concrete network-device example, but its GRE-tunnel finding applies to at least one device, not automatically all three.
- Singapore’s UNC3886 case shows a distinct operation with reported unauthorized access but, as of CSA’s February 2026 publication, no evidence of customer-record theft or service disruption.
- These accounts do not verify a 5G-specific campaign, a campaign-wide victim count, or a campaign-wide financial loss figure.
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