This is a phase 1/2, open-label, single arm, multicenter study in patients with advanced or metastatic HPV16- or HPV52-positive carcinomas who have progressed after at least one line of systemic therapy, including but not limited to combination chemotherapy and/or combination chemo-immunotherapy

This study will be conducted in 2 parts:

The Phase 1 part of the trial consists of a dose-escalation portion designed to evaluate the safety and tolerability of SCG142, and to identify the RP2D.

The Phase 2 part of the trial is designed to evaluate the preliminary efficacy of SCG142 in the same patient populations.

Main Inclusion Criteria:

1. Histologically confirmed squamous cell carcinoma (SCC); may include any of the following tumor types: cervical, head and neck, anal, penile, vulvar, or vaginal.
2. Tumor tissue positive for HPV16 or HPV52.
3. Advanced or metastatic carcinoma with progression after at least 1 line of standard of care systemic therapies, including but not limited to combination chemotherapy and/or combination chemo-immunotherapy.
4. Human leukocyte antigen (HLA)-A*02:01 genotype.
5. Measurable disease as defined by RECIST v1.1.
6. Eastern Cooperative Group (ECOG) Performance Status of 0 or 1.
7. Anticipated life expectancy ≥3 months.
8. Adequate laboratory parameters including hematologic, renal, hepatic and coagulation function.

Main Exclusion Criteria:

1. Presence of clinically relevant or active seizure disorder, stroke, cerebrovascular ischemia/hemorrhage, dementia, cerebellar disease, or any autoimmune disease with central nervous system (CNS) involvement.
2. Active brain metastasis or leptomeningeal metastases.
3. History of other malignancy within 2 years prior to Screening.
4. History of organ transplant.
5. Positive for human immunodeficiency virus (HIV) or known acquired immunodeficiency syndrome (AIDS).
6. History of active cardiac disease.
7. History of active pulmonary disease.
8. Active, known, or suspected autoimmune disease.
9. Lack of peripheral venous or central venous access, or any condition that may prevent trial sample collection and administration of SCG142.
10. Prior exposure to any cell therapy including, but not limited to natural killer (NK) cells, cytokine-induced killer (CIK) cells, dendritic cells (DCs), cytotoxic T lymphocytes (CTLs), stem cell therapy, and CAR/TCR-T cell therapy.
11. Allergy to LD chemotherapy (cyclophosphamide or fludarabine) and/or any component of SCG142.
12. Any serious medical condition or abnormality in clinical laboratory tests.