Southern Silver Initiates Infill Drilling on the Puro Corazon Target, Cerro Las Minitas Project, Durango Mexico

About this update from Southern Silver Exploration Corp.

Vancouver, British Columbia--(Newsfile Corp. - June 18, 2026) - Southern Silver Exploration Corp. (TSXV: SSV) (the "Company" or "Southern Silver") reports that crews have mobilized in preparation for further drilling on the Cerro Las Minitas Project, Durango, Mexico. The upcoming exploration program follows 2025-26 drilling on the property which successfully delineated mineralization at the Puro Corazon target and returned multiple intercepts of high-grade, polymetallic Ag-Pb-Zn mineralization. Mineralization was extended laterally for the full 400 metres strike-length of the Puro Corazon claim and to depths of up to 450 metres below surface. The current program will build upon this earlier work and includes up to 12,500 metres of definition drilling designed to increase the classification confidence of a subset of near-surface, high-grade mineralization in the Puro Corazon target and forms part a larger program to assess, geologically and spatially, the historic Puro Corazon claim and to incorporate the underlying mineralization into the larger CLM district. Other work on the CLM Project includes an update of the mineral resource estimate based on the most recent drilling at Puro Corazon, scheduled for Q3 2026 and the advancement of several engineering opportunities identified in the 2024 preliminary economic assessment ("PEA") of the project. As currently modelled, the Cerro Las Minitas project features a large-scale underground mining operation with robust project economics and high gross revenues in a well located and mining friendly jurisdiction in southeast Durango, Mexico. For more information on the details of the current economic assessment of the Cerro Las Minitas project please refer to Southern Silver's news release dated June 10, 2024. Next Steps The Company is planning to incorporate the results of the 2025-26 Puro Corazon drill program into the much larger Cerro Las Minitas project which is expected to significantly enhance both the project economics and the mine plan. Final assays from the 2025-26 drilling have been received. Work through Q3-Q4 2026 will include: The Company reports that, subsequent to acquisition of the Puro Corazon claim and to the July 2024 PEA, work on the Cerro Las Minitas project continues advancing numerous upside economic and mine development opportunities while also derisking and ...

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