CVE-2026-65788

Privilege escalation via DWM use-after-free

Published Aug 11, 2026 · Updated Aug 25, 2026

Use-after-free in Desktop Window Manager in Microsoft Windows 11 and Windows Server 2025 allows local users to gain elevated privileges. Microsoft's public records identify stale memory reuse in DWM but do not disclose the affected code path or the operation that dereferences a freed object. Exploitation requires local code execution with low privileges on an affected build and can lead to full system compromise if the flaw is used to obtain SYSTEM rights.

CVSS severity7.0
High
EPSS probability1.68%
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 Desktop Window Manager in Microsoft Windows 11 and Windows Server 2025 allows local users to gain elevated privileges. Microsoft's public records identify stale memory reuse in DWM but do not disclose the affected code path or the operation that dereferences a freed object. Exploitation requires local code execution with low privileges on an affected build and can lead to full system compromise if the flaw is used to obtain SYSTEM rights.

The record

CVE
CVE-2026-65788
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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

7.0MicrosoftCVSS:3.1/AV:L/AC:H/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-416Use After Free
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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