A Study of CLSP-1025 in Adult Patients With Solid Tumors That Harbor the p53 R175H Mutation

Key Inclusion Criteria:

* Patients must be at least 18 years of age at the time of signing the informed consent.
* Patients must be willing and able to provide written informed consent
* Patients must have locally advanced or metastatic solid tumors that have progressed after standard of care therapy or for which no standard therapy exists
* Tumors must harbor a TP53 R175H variant mutation confirmed by an accredited laboratory-based test
* Patients must be HLA-A\*02:01 positive by central assay
* Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 at the time of enrollment
* Adequate hematological, renal and hepatic function
* Per Investigator judgement, patient is willing and able to complete study visits and/or procedures per the protocol and comply with study requirements for study participation

Key Exclusion Criteria:

* Patients with Li-Fraumeni syndrome or other known germline p53 R175H mutation
* Patients who have received other p53 R175H-directed therapies
* Patients who have not fully recovered from adverse events due to previous anticancer therapies
* Patients with active infection requiring systemic antimicrobial therapy
* Any other primary malignancy within the 2 years prior to enrollment (except for non- melanoma skin cancer, carcinoma in situ (eg, cervix, bladder, breast) or prostate cancer in remission.
* Known active central nervous system metastases and/or carcinomatous meningitis