This indicates an attack attempt to exploit a Memory Corruption vulnerability in Adobe Illustrator.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted RTF file. Successful exploitation could result in the execution of arbitrary code under the context of the target application.
Illustrator CC 2019 version 24.0 and earlier versions
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.