A UK-based telecom provider, Colt Technology Services, is experiencing a multi-day outage caused by a cyberattack attributed to the WarLock ransomware gang. The attack involved the theft of sensitive data and exploited a zero-day vulnerability in Microsoft SharePoint, highlighting critical cybersecurity vulnerabilities. #WarLock #CVE-2025-53770
Keypoints
- Colt Technology Services faces a prolonged outage due to a cyberattack starting on August 12.
- The attack led to the shutdown of support services like Colt Online and Voice API platforms.
- A threat actor claiming to be part of WarLock ransomware advertised stolen data for sale.
- The breach likely exploited a critical zero-day vulnerability in Microsoft SharePoint (CVE-2025-53770).
- The stolen data includes financial, employee, customer information, and internal communications.