Singapore lifts lid on UNC3886 telecom hack hitting Singtel, StarHub, M1 and Simba
Hackers linked to UNC3886 breached parts of all four major Singapore telcos’ networks in 2025, authorities said Tuesday. No service disruptions or evidence of stolen customer data were found. A multi-agency response, Operation CYBER GUARDIAN, lasted over 11 months. Officials said attackers used a zero-day exploit and exfiltrated some technical network data.