Colt Technology Services is working on restoring systems disrupted by a ransomware attack that involved data theft.
August 21, 2025 By Eduard Kovacs
UK-based multinational telecom firm Colt Technology Services confirmed on Thursday that hackers have taken some data from its systems.
Colt provides network, voice, and other services to customers in Europe, Asia and the United States. The company announced on August 14 that some support services had become unavailable due to some systems being taken offline in response to a cyber incident.
The telecommunications firm said at the time that the internal system on which it detected the intrusion was separate from customer infrastructure. Colt has since been working on restoring impacted systems, but some services, such as Colt Online and its Voice API platform, remain offline.
In an update shared on August 21, Colt said that while impacted business support systems are separate from customer infrastructure, its investigation found that some data has been taken by the attackers.
