According to this paper the virus triggers the innate immune system and induces inflammatory cytokines as well as interferon stimulated genes (which is a response to a viral infection). It seems to be recognized by the cells via the Toll-like receptor 2 and CD14, which subsequently trigger the cytokine production. A schematic view comes from the second paper:
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These two articles are interesting in this context, the first addresses CMV in special, the second is a pretty recent review about how viruses are recognized and how cytokines are involved:
* Human cytomegalovirus activates inflammatory cytokine responses via CD14 and Toll-like receptor 2.
* Learning from the messengers: innate sensing of viruses and cytokine regulation of immunity - clues for treatments and vaccines.