Vulnerable component: Windows
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-190 - Integer Overflow or Wraparound
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to integer overflow when processing malformed WMF image file. By persuading the victim to open a specially crafted WMF image file containing a malformed header, a remote attacker can cause memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.
Note: according to reports this vulnerability was being actively exploited before Microsoft issued security patch.