The University of the West of Scotland is experiencing an "ongoing cyber incident" which is affecting a number of its digital systems.
It is working with experts from Police Scotland, the National Cyber Security Centre, and the Scottish government.
The university's website is currently down with an error message apologising for "inconvenience".
A spokesperson said staff were following a "controlled process" and were working on a resolution.
They confirmed that graduations planned this week will not be affected.
The university has campuses in Paisley, Ayr, Dumfries and Blantyre as well as London.
The error message on its website reads: "Our website is currently down and we apologise for any inconvenience this might cause.
"We are working to resolve this as soon as possible, please check back again soon."
