ICS-CERT has released an advisory on a PHOENIX CONTACT mGuard vulnerability. Versions 7.2 to 8.6.0 are affected. Successful exploitation of this vulnerability could allow for an attacker to modify firmware update packages. PHOENIX CONTACT recommends that affected users upgrade to firmware version 8.6.1. ICS-CERT also recommends a series of defensive measures to minimize the risk of exploitation of this vulnerability. ICS-CERT.