CVE-2026-62798: Win32k Information Disclosure Vulnerability

Published Aug 11, 2026
·
Updated

Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally.

Other sources

Win32k Information Disclosure Vulnerability

— Microsoft

Affected Software

10 affected componentsFixes available
Microsoft Windows 11=24H2
10.0.26100.916810.0.26000.9106
Microsoft Windows Server 2025<10.0.26100.33296, <10.0.26100.33222
10.0.26100.3329610.0.26100.33222
Microsoft Windows 11=24H2
10.0.26100.916810.0.26100.9106
Microsoft Windows Server 2025<10.0.26100.33296, <10.0.26100.33222
10.0.26100.3329610.0.26100.33222
Microsoft Windows 11=26H1
10.0.28000.2704
Microsoft Windows 11=25H2
10.0.26200.916810.0.26100.9106
Microsoft Windows 11=25H2
10.0.26200.916810.0.26100.9106
Microsoft Windows 11=23H2
10.0.22631.7517
Microsoft Windows 11=23H2
10.0.22631.7517
Microsoft Windows 11=26H1
10.0.28000.2704

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.9168Fixed in 10.0.26000.9106Patch KB5120994
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.28000.2704Patch KB5121000
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26200.9168Fixed in 10.0.26100.9106Patch KB5120994
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22631.7517Patch KB5120240

Event History

Aug 11, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:04 PM
Data Sourced
via MITRE·05:04 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-62798?

The severity of CVE-2026-62798 is medium with a score of 5.5.

2

What does CVE-2026-62798 affect?

CVE-2026-62798 affects Microsoft Windows 11 and Microsoft Windows Server 2025.

3

How do I fix CVE-2026-62798?

To address CVE-2026-62798, it is recommended to apply the latest security updates provided by Microsoft.

4

What type of vulnerability is CVE-2026-62798?

CVE-2026-62798 is classified as an information disclosure vulnerability due to untrusted pointer dereference in Windows Win32K.

5

Who is potentially impacted by CVE-2026-62798?

Authorized attackers with local access could potentially exploit CVE-2026-62798 to disclose sensitive information.

Company

Resources

Contact

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