Triton has issued a security warning for their ATM based on an IOActive security assessment, which was presented at BlackHat earlier this year. It has seven "bullet" points that are very basic, illustrating the simplicity of managing risk versus the danger of ignoring it.
They also said this about the assessment:
Security is among Triton's utmost concerns; strengthening our ATMs' defenses is an on-going effort. The opportunity is welcomed to highlight the success of Triton's continuing efforts to protect ATMs from emerging threats. Triton is hopeful that Mr. Jack's work serves as a reminder to customers to be vigilant about installing software updates immediately upon release.