MSO app vendor hit by 'cyber incident', OneService app users not affected Toggle share menu Advertisement The Municipal Services Office's OneService mobile app. (Photo: Facebook/One Service Community) 28 Jun 2021 01:10PM) Share this content Bookmark SINGAPORE: A Municipal Services Office (MSO) vendor has been affected by a "cyber incident", in which a "malicious actor" deleted data related to push notifications for MSO’s OneService application. The office was alerted to the incident on the databases of one of its vendors Apptitude on Jun 19, MSO said in a statement on Monday (Jun 28). Advertisement Advertisement “The malicious actor deleted data related push notifications for MSO’s OneService application, such as device types and past push notification messages,” it added.