A Phase 1a/1b open-label, multicenter, dose-escalation, and dose expansion study to evaluate the safety and activity of TEV-56278, as a single agent and in combination with pembrolizumab, in participants with selected locally advanced or metastatic solid tumors

• Have an established histological diagnosis of selected solid tumor and must have received and progressed on established standard therapies or have been intolerant to such therapy or have been considered by the Investigator as ineligible for approved standard therapy
• Have a life expectancy≥12 weeks at the time of the screening
• Women of childbearing potential must agree to use highly effective methods of contraception for the course of the trial through 120 days after the last dose of trial medication
• Males who are sexually active with women of childbearing potential must agree to use condoms and refrain from donating sperm for the course of the trial through 120 days after the last dose of trial medication

NOTE- Additional criteria apply, please contact the investigator for more information

• Has a history of systemic treatment therapy for cancer (including chemotherapy, immunotherapy, radiotherapy, or other investigational drug) or surgery within 4 weeks prior to baseline
• Is currently receiving or has received hematopoietic colony-stimulating growth factors within 2 weeks before screening or transfusion support 4 weeks prior to screening
• Has a diagnosis of immunodeficiency
• Has active known autoimmune disease.
• Has a history of or known active brain metastases and/or carcinomatous meningitis and/or leptomeningeal metastasis
• Has active or uncontrolled serious infections requiring systemic therapy within 14 days prior to baseline
• Has a history of clinically significant cardiovascular or cerebrovascular disease in previous 6 months prior to screening
• Has evidence of clinically significant interstitial lung disease or active, noninfectious pneumonitis
• Has a seizure disorder requiring therapy (such as steroids or antiepileptics)