CVE-2026-41096: Windows DNS Client Remote Code Execution Vulnerability

Published May 12, 2026
·
Updated

Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.

Other sources

Windows DNS Client Remote Code Execution Vulnerability

— Microsoft

Affected Software

21 affected componentsFixes available
Microsoft Windows 11 23h2<10.0.22631.7079
Microsoft Windows 11 23h2<10.0.22631.7079
Microsoft Windows 11 24h2<10.0.26100.8390
Microsoft Windows 11 24h2<10.0.26100.8390
Microsoft Windows 11 25h2<10.0.26200.8390
Microsoft Windows 11 25h2<10.0.26200.8390
Microsoft Windows 11 26h1<10.0.28000.2113
Microsoft Windows 11 26h1<10.0.28000.2113
Microsoft Windows Server 2022 23h2<10.0.25398.2330
Microsoft Windows Server 2025<10.0.26100.32772
Microsoft Windows 11=26H1
10.0.28000.2113
Microsoft Windows 11=23H2
10.0.22631.7079
Microsoft Windows 11=24H2
10.0.26100.845710.0.26100.8390
Microsoft Windows Server 2025<10.0.26100.32860, <10.0.26100.32772
10.0.26100.3286010.0.26100.32772
Microsoft Windows Server 2022, 23H2 Edition<10.0.25398.2330
10.0.25398.2330
Microsoft Windows 11=24H2
10.0.26100.845710.0.26100.8390
Microsoft Windows 11=25H2
10.0.26200.845710.0.26200.8390
Microsoft Windows 11=26H1
10.0.28000.2113
Microsoft Windows Server 2025<10.0.26100.32860, <10.0.26100.32772
10.0.26100.3286010.0.26100.32772
Microsoft Windows 11=23H2
10.0.22631.7219
Microsoft Windows 11=25H2
10.0.26200.845710.0.26200.8390

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 10.0.28000.2113Patch KB5089548
  2. Upgrade

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

    Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423
  3. Upgrade

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

    Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466
  4. Upgrade

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

    Fixed in 10.0.22631.7079Patch KB5087420
  5. Upgrade

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

    Fixed in 10.0.25398.2330Patch KB5087541
  6. Upgrade

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

    Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466
  7. Upgrade

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

    Fixed in 10.0.22631.7219Patch KB5093998

Event History

May 12, 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·04:58 PM
Data Sourced
via MITRE·04:58 PM
DescriptionSeverity
Data Sourced
via NVD·06:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-41096?

CVE-2026-41096 has a high severity rating due to the potential for remote code execution.

2

How do I fix CVE-2026-41096?

To fix CVE-2026-41096, apply the appropriate patches provided by Microsoft for your affected Windows version.

3

What systems are affected by CVE-2026-41096?

CVE-2026-41096 affects various versions of Microsoft Windows, including Windows 11 and Windows Server 2025.

4

Can CVE-2026-41096 be exploited remotely?

Yes, CVE-2026-41096 can be exploited remotely by an unauthorized attacker to execute code on vulnerable systems.

5

What is the nature of the vulnerability in CVE-2026-41096?

CVE-2026-41096 is a heap-based buffer overflow vulnerability in the Windows DNS Client.

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