CVE-2022-34703

SYSTEM code execution via partmgr.sys integer overflow

Published Aug 9, 2022 · Updated Jun 4, 2025

Integer overflow in Microsoft Windows Partition Management Driver allows local users to execute arbitrary code with SYSTEM privileges. partmgr.sys fails to validate user-supplied data before using an overflowing integer in a buffer allocation. Exploitation requires prior low-privileged code execution on the target and yields arbitrary code execution as SYSTEM.

CVSS severity7.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Microsoft Windows Partition Management Driver allows local users to execute arbitrary code with SYSTEM privileges. partmgr.sys fails to validate user-supplied data before using an overflowing integer in a buffer allocation. Exploitation requires prior low-privileged code execution on the target and yields arbitrary code execution as SYSTEM.

The record

CVE
CVE-2022-34703
Published
Aug 9, 2022
Updated
Jun 4, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-269, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.19387

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19387
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3287
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.1889
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.856
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.1889
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.1889
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3287
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1889
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.887
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3287; version=10.0.17763.0 <10.0.17763.3287

Published CVSS scores

7.8Rapid7CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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