CVE-2023-35323

Code execution via OLE use-after-free

Published Jul 11, 2023 · Updated Jan 1, 2025

Use-after-free in Windows OLE in Windows 11 21H2 and Windows Server 2022 allows local users to execute code via crafted input. Microsoft identifies the OLE subsystem and memory-lifetime error but has not disclosed the affected object, function, or invalid reuse operation. Exploitation requires local delivery and user interaction, and successful code executes in the affected user's security context.

CVSS severity7.8
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Windows OLE in Windows 11 21H2 and Windows Server 2022 allows local users to execute code via crafted input. Microsoft identifies the OLE subsystem and memory-lifetime error but has not disclosed the affected object, function, or invalid reuse operation. Exploitation requires local delivery and user interaction, and successful code executes in the affected user's security context.

The record

CVE
CVE-2023-35323
Published
Jul 11, 2023
Updated
Jan 1, 2025
Vendor
Microsoft
Product
Windows 11 version 21H2
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 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=10.0.0 <10.0.22000.2176

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2176
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1850

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

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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