Your risk profile just changed dramatically. You might think the war in Ukraine will not affect you, but your risk is higher than you think.
Do you know who ultimately writes the code your vendor delivers? Your contract is with a large system integrator in your own country. They outsource actual coding to several subcontractors, who sub-subcontract until the actual code is written by a team of three people in a basement in Kyiv. And right now, an adversary with nation-state resources is out to destroy the Ukrainian software industry along with the rest of the country.
Remember the attack that hit Maersk Lines a few years ago? They are the world’s largest container shipping company and have strong cyber defenses. Nevertheless, they suffered a two-week outage and lost $300 million because an attack on their Ukrainian subsidiary got through their defenses.
Revisit your risk management plan. You need stronger network security towards your all your suppliers.