Optus customers have expressed concern over a potential data privacy breach, following reports several users saw another person’s name, mobile number, address and other details, when logging into their telco account.

The telco has acknowledged Thursday’s issue, and after temporarily disabling the Optus My Account website, claims it’s now operational.

Optus asserts it’s working with third-party vendors to identify the root cause of the issue.

The telco’s social media pages were filled with concerns from customers, with many seeing names such as ‘David’ and ‘Vladimir’ under their account details.

The fact the My Account page is still down is honestly extremely disconcerting. That’s 8 hours offline, Optus what’s going on?

— 🎄 Tommy 🎄 (@ShiftyChips) 14 February 2019

Some customers claim the website was auto-refreshing every one to two seconds, and after getting into the log-in section were met with another person’s details.

The auto-refresh error has some users concerned their personal information may have been breached.

Optus asserts it’s continuing to investigate the root cause of the issue, and if required will contact affected customers.

The news follows reports of a phishing email affecting Optus customers, including a PDF link to an invoice containing malware. The telco is aware of the scam which has been circulating since August.