A Study of hSTC810 With Advanced/Metastatic Solid Tumors (STCUBE-001)

Inclusion Criteria:

* Male or female aged at 18 ≥ years
* Capable and willing to give signed informed consent
* At least one measurable lesion as determined by RECIST Ver.1.1
* ECOG PS score ≤ 1
* Expected survival ≥ 12 weeks
* For female or male patients of reproductive potential: Agree to use contraception throughout the study and at least 6 months after the last dose.

Exclusion Criteria:

* Subject who has received anti-cancer treatment within 4 weeks prior to the first dose of study treatment.
* Subject who has received radiotherapy or major surgery within 4 weeks prior to screening.
* Any toxicity due to prior therapy that has not resolved to ≤ Grade 1 or returned to baseline by the time of starting study treatment.
* Subject with known severe (≥Grade 3) hypersensitivity to any checkpoint inhibitor.
* Clinically significant laboratory abnormalities.
* Subject with a history of another invasive malignancy within 3 years before the first dose of study drug.
* Subject with active central nervous system (CNS) metastases.
* Subject who requires high dose of steroids or other immunosuppressive medications.
* Subject with a history of autoimmune disease that has required systemic treatment in the past 2 years.
* Subject with active infection that requires systemic antimicrobial treatment.
* Subject with active HBV or HCV infection.
* Subject who has a known history of HIV infection.
* Subject with active tuberculosis.
* Subject with a documented history of a cerebral vascular event, unstable angina, myocardial infarction, or cardiac symptoms consistent with NYHA Class IV within 6 months prior to screening.
* Subject with a history of idiopathic pulmonary fibrosis, organizing pneumonia, drug induced pneumonitis, idiopathic pneumonitis, or evidence of active pneumonitis on screening CT scan.
* Subject who has received a prior allogeneic stem cell or solid organ transplant.
* Subject with a positive coronavirus disease (COVID) test during screening.
* Subjects who have received a live attenuated vaccine within 30 days prior to screening.
* Subject with another underlying medical condition.