Incorrect access controls in nasapi in Buffalo TS5600D1206 version 3.61-0.10 allow attackers to call dangerous internal functions via the "method" parameter.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-5269
https://blog.securityevaluators.com/buffalo-terastation-ts5600d1206-nas-cve-disclosure-ab5d159f036d