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CVE-2021-27965

37
FAUCET Score

CVE-2021-27965 is a critical buffer overflow vulnerability (CWE-120) in the MsIo64.sys driver, affecting MSI Dragon Center versions prior to 2.0.98.0. This flaw allows for privilege escalation through specially crafted IOCTL requests (0x80102040, 0x80102044, 0x80102050, or 0x80102054). With a CVSS score of 9.8 (Critical), it presents a severe risk, enabling complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential interest.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.98.0CPE matchmatch criteria
cpe:2.3:a:msi:dragon_center:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
11.84%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1184 is in the 91st percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia nvd_reference
View patch

References

github.com / kronl/cve/tree/master/MSI_Dragon_Center
Broken LinkThird Party Advisory
microsoft.com / en-us/p/msi-dragon-center/9nh7n2bv1cqq
PatchVendor Advisory