General practices using tools from Pen CS were temporarily unable to log into services in late June following a ransomware attack on the company's externally hosted server, but Pen says the issue was quickly resolved and it is now back to business as usual.

The incident occurred on the morning of June 25 and also knocked out services for the full day of Thursday, June 28. Pen CS assured users that no personal, licensing, practice or patient data was affected and the company does not hold any practice data.