Official Adobe support for Magento 1.x has been terminated, and no more official core security updates will be issued. If you must keep running a Magento 1.x shop, raw original Magento 1.9 source code will gradually face growing security risks, and many old built‑in payment gateways will become incompatible with modern banking and PSD‑2 requirements.
For ongoing community maintenance, there is a well‑known community fork project: OpenMage LTS, hosted at…