A total of 220,394 registered organ donors are the latest victims to have their data leaked, according to a report by technology portal Lowyat.net.
"We can confirm that files containing complete details of pledged organ donors has leaked online as early as September 2016," said the report.
The number of victim is doubled, as each entry also contains personal information on the registrant’s nominated next of kin.
The data, which is updated until Aug 31, 2016, contained, among others, the donors' names, MyKad numbers, ethnicities, addresses, next of kin, contact numbers and emails, as well as the organs to be donated.
It said the information field appeared to be the same as that collected on the Derma Organ website, the government's portal for the public to register as organ donors.
"However, we are fairly certain that the leaked data does not originate from the online form - which itself doesn't appear to be working at the time of writing.
"The leaked data contains signup data from government hospitals, as well as National Transport Resource Centres across the country – which would mean that it has been retrieved from a central database," said the report.
In the telco data leak, believed to be the largest in Malaysia’s history, was linked to the Communications and Multimedia Commission's Public Cellular Blocking Service (PCBS).