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Nation-State Actors Compromise Ribbon Communications Network

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3 unique sources, 3 articles

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Ribbon Communications, a provider of backbone technology for communication networks, detected unauthorized access to its IT network in early September 2025. The intrusion, potentially initiated as early as December 2024, is attributed to a nation-state actor. The breach affected several customer files saved on two laptops outside the main network. Ribbon has notified impacted customers and does not expect material financial impact. The attack profile suggests Chinese involvement, consistent with known cyberespionage campaigns targeting telecommunications companies. Ribbon Communications has over 3,100 employees in 68 global offices and is working with third-party cybersecurity experts and federal law enforcement to investigate the breach. The company expects to incur additional costs in the fourth quarter of 2025 related to the breach investigation and network strengthening efforts. Ribbon's solutions are used by major telecommunications providers and critical infrastructure organizations, including the US Department of Defense and the City of Los Angeles. The company is based in Plano, Texas and specializes in communications software and IP optical networking technology for service providers and critical infrastructure organizations. The company was formed in 2017 following the merger of Sonus Networks and Genband. The attack on Ribbon follows several notable breaches of US firms, as well as telecom companies in other countries, in recent years. The most notable of these attacks were committed by Salt Typhoon, a Chinese nation-state threat group focused on cyberespionage.

Timeline

  1. 30.10.2025 14:36 3 articles · 11d ago

    Ribbon Communications Detects Unauthorized Access in Early September 2025

    Ribbon Communications identified unauthorized access to its IT network in early September 2025, with potential initial access dating back to December 2024. The breach, attributed to a nation-state actor, affected several customer files on two laptops outside the main network. The company has notified impacted customers and does not expect material financial impact. The attack profile suggests Chinese involvement, consistent with known cyberespionage campaigns targeting telecommunications companies. Ribbon Communications has over 3,100 employees in 68 global offices and is working with third-party cybersecurity experts and federal law enforcement to investigate the breach. The company expects to incur additional costs in the fourth quarter of 2025 due to the breach investigation and network strengthening efforts. The company's incident response plan was initiated with assistance from several third-party cybersecurity organizations and federal law enforcement. The company cannot disclose the association to nation-state actors at the request of the third parties it is working with. Ribbon Communications is based in Plano, Texas and specializes in communications software and IP optical networking technology for service providers and critical infrastructure organizations. The company was formed in 2017 following the merger of Sonus Networks and Genband.

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