The acnadddmpdata function in epan/dissectors/packet-acn.c in the ACN dissector in Wireshark 1.6.x before 1.6.14 and 1.8.x before 1.8.6 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via an invalid count value in ACNDMPADTD_RE DMP data.