In Shanda MapleStory Online V160, the SdoKeyCrypt.sys driver allows privilege escalation to NT AUTHORITY\SYSTEM because of not validating t…

published 2019-03-12 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-19094

cvss: 7.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

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.

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/DoubleLabyrinth/SdoKeyCrypt-sys-local-privilege-elevation referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-129 Improper Validation of Array Index
CWE-787 Out-of-bounds Write

References

github.com /DoubleLabyrinth/SdoKeyCrypt-sys-local-privilege-elevation
exploit, third-party-advisory

Sources

CVE List CVE-2019-9729
NVD CVE-2019-9729

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary