Emerce reports (translation):
Unknown third parties have gained access to the ICT environments of the Hogeschool van Amsterdam and the University of Amsterdam, the Security and Operations Center has found.
Measures are taken to limit the consequences and to ensure that education and research can proceed as undisturbed as possible.
The schools have disabled several systems as a precaution.
Read more on Emerce.
h/t, @Chum1ng0, who is probably chuckling somewhere because once again, he makes me deal with translators.