This security update is covered by CVE-2016-5228 - Rumba 9.x stack buffer overflow vulnerability.
Micro Focus Rumba 9.x
This security update addresses a potential remote code execution via buffer overflow in the RUMBA 9.x.
Rumba 9.4 (HF 12815), 9.3 (HF 11997)
We would like to give special thanks to both Umit Aksu (email@example.com), a contractor, and Gjoko Krstic (LiquidWorm) working with Zero Science Lab who, independently, discovered this vulnerability and reported it to us.