Adobe Flash Player 28.0.0.161 addresses critical use-after-free vulnerabilities that could lead to remote code execution (CVE-2018-4877, CVE-2018-4878). Successful exploitation could potentially allow an attacker to take control of the affected system.
Adobe is aware of a report that an exploit for CVE-2018-4878 exists in the wild, and is being used in limited, targeted attacks against Windows users. These attacks leverage Office documents with embedded malicious Flash content distributed via email.