CVE-2024-20658

Local privilege escalation via out-of-bounds read

Published Jan 9, 2024 · Updated May 3, 2025

Out-of-bounds read in Microsoft Virtual Hard Disk on affected Windows releases allows local users to elevate privileges. Microsoft has not published the affected function, input path, or how the out-of-bounds read yields elevated execution. A low-privileged local account is required; no user interaction is needed, and successful exploitation grants control beyond that account.

CVSS severity7.8
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Microsoft Virtual Hard Disk on affected Windows releases allows local users to elevate privileges. Microsoft has not published the affected function, input path, or how the out-of-bounds read yields elevated execution. A low-privileged local account is required; no user interaction is needed, and successful exploitation grants control beyond that account.

The record

CVE
CVE-2024-20658
Published
Jan 9, 2024
Updated
May 3, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 9, 2024CVE publishedPublication date reported by the CVE source.
  2. May 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <10.0.10240.20402

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20402
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5329
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6614
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2713
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24664
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24664
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.3930
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.643
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6614
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.3007
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.3930
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.21765
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5329
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.3007
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.3007
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.6614
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2227
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.5329; version=10.0.17763.0 <10.0.17763.5329
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.21765

Published CVSS scores

7.8Microsoft CorporationCVSS: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-125Out-of-bounds Read
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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