This article presents a case report of a 26-year-old female patient with a 13-year history of Systemic Lupus Erythematosus (SLE), who was admitted to the hospital with severe headaches, low-grade fever, diplopia, and arthritis. These symptoms, although partially overlapping with an SLE flare, raised suspicion of an infectious complication or Neuropsychiatric SLE (NPSLE). A neurological examination revealed significant focal deficits. Features of left abducens nerve (CN VI) palsy, a flattened nasolabial fold, and ataxia of the left lower limb were observed. Based on the clinical image, which combined systemic symptoms (fever, headache) with focal neurological deficits (CN VI palsy, ataxia), a preliminary suspicion of meningitis (ZOMR) and/or encephalitis was raised. Following necessary diagnostic tests, including cerebrospinal fluid (CSF) analysis, the definite diagnosis was established: Cryptococcal Meningitis. This serious, rare fungal infection, caused by Cryptococcus neoformans, is particularly dangerous for immunocompromised patients, including those treated with immunosuppressants for SLE. This case has significant clinical implications. It suggests that in Lupus patients presenting with symptoms indicative of central nervous system involvement, opportunistic infections must always be considered, even if the initial suspicion leans toward SLEassociated aseptic meningitis. The case underscores that the differential diagnosis must be broad, encompassing rare pathogens, especially when neurological findings, though perhaps ambiguous for typical meningitis, clearly indicate underlying pathology.