The web service on Epson WorkForce WF-2861 10.48 LQ22I3(Recovery-mode) WF-2861 10.51.LQ20I6 and WF-2861 10.52.LQ17IA devices allows remote attackers to cause a denial of service via a FIRMWAREUPDATE GET request as demonstrated by the /DOWN/FIRMWAREUPDATE/ROM1 URI.