CVE-2019-9729: Shanda Maplestory Online

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

In Shanda MapleStory Online V160, the SdoKeyCrypt.sys driver allows privilege escalation to NT AUTHORITY\SYSTEM because of not validating the IOCtl 0x8000c01c input value, leading to an integer signedness error and a heap-based buffer underflow.

Affected products

• Shanda Maplestory Online: version 160.0 only

Published 2019-03-12. Last modified 2026-06-17.