Purpose of Review <p>This paper investigates the role of Human Cytomegalovirus (HCMV) in promoting immune tolerance within gliomas, particularly glioblastoma multiforme (GBM). Understanding how HCMV influences the tumor immune microenvironment may reveal novel therapeutic targets.</p> Recent Findings <p>Recent studies have detected HCMV proteins in a high proportion of glioma tissues. HCMV modulates immune responses by impairing antigen presentation, altering cytokine profiles, and enhancing the activity of immunosuppressive cells such as regulatory T cells and myeloid-derived suppressor cells. Further, viral proteins have been shown to inhibit immune activation and promote immune evasion.</p> Summary <p>HCMV contributes to the immunosuppressive landscape of gliomas, facilitating tumor progression through multiple mechanisms of immune modulation. Targeting HCMV-mediated pathways may improve the efficacy of immunotherapies and offer new treatment strategies for patients with glioma.</p>