Provide the best solution available to you to help alleviate the issue. If you have access to SMEs then get their opinion first. After providing the solution you have on hand, speak to others who are knowledgeable about the topic (SMEs, Vendors, Folks from other appropriate organizations), and research online to find a better more sustainable solution to the problem. Throughout the process be sure to communicate the issue and challenges to the appropriate managers and user community for clarity, feedback, and possible assistance.