CVE-2021-29337Public exploit

Local privilege escalation via unsafe physical memory mapping

Published Jun 21, 2021 · Updated Aug 3, 2024

Improper access control in MSI Dragon Center 2.0.104.0 allows local users to escalate privileges via the MODAPI.sys IOCTL 0x9c406104 interface. The driver passes user-controlled physical addresses to MmMapIoSpace, mapping physical memory into user-accessible virtual space without restricting the operation. Low-privileged Windows users can invoke the device interface without interaction and potentially obtain kernel-memory read or write capability and SYSTEM-level privileges.

CVSS severity7.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in MSI Dragon Center 2.0.104.0 allows local users to escalate privileges via the MODAPI.sys IOCTL 0x9c406104 interface. The driver passes user-controlled physical addresses to MmMapIoSpace, mapping physical memory into user-accessible virtual space without restricting the operation. Low-privileged Windows users can invoke the device interface without interaction and potentially obtain kernel-memory read or write capability and SYSTEM-level privileges.

The record

CVE
CVE-2021-29337
Published
Jun 21, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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