What is the severity of CVE-2025-21326?

CVE-2025-21326 is classified as a critical remote code execution vulnerability.

How do I fix CVE-2025-21326?

To fix CVE-2025-21326, apply the security updates provided by Microsoft, specifically KB5050009 for Windows Server 2025.

What software is affected by CVE-2025-21326?

CVE-2025-21326 affects Microsoft Windows Server 2025 and Windows Server 2022, 23H2 Edition.

What are the potential impacts of exploiting CVE-2025-21326?

Exploiting CVE-2025-21326 may allow attackers to execute arbitrary code and take control of the affected system.

How can I verify if my system is vulnerable to CVE-2025-21326?

To verify vulnerability to CVE-2025-21326, check if your system is running unsupported versions of Windows Server that do not have the latest security patches.

Vulnerability/
CVE-2025-21326

high

7.8

CWE

843

EPSS

0.050%

14/1/2025

21/2/2025

CVE-2025-21326: Internet Explorer Remote Code Execution Vulnerability

First published: Tue Jan 14 2025(Updated: )

Internet Explorer Remote Code Execution Vulnerability

Credit: secure@microsoft.com

Affected Software	Affected Version	How to fix
Microsoft Windows Server 2025		fix available externally
Microsoft Windows Server 2025		fix available externally
Microsoft Windows Server 2022 23H2	<10.0.25398.1369
Microsoft Windows Server 2025	<10.0.26100.2894
Microsoft Windows Server 2022 23H2		fix available externally

Remedy

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21326

Never miss a vulnerability like this again

Reference Links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21326 (Advisory)

Frequently Asked Questions

What is the severity of CVE-2025-21326?
CVE-2025-21326 is classified as a critical remote code execution vulnerability.
How do I fix CVE-2025-21326?
To fix CVE-2025-21326, apply the security updates provided by Microsoft, specifically KB5050009 for Windows Server 2025.
What software is affected by CVE-2025-21326?
CVE-2025-21326 affects Microsoft Windows Server 2025 and Windows Server 2022, 23H2 Edition.
What are the potential impacts of exploiting CVE-2025-21326?
Exploiting CVE-2025-21326 may allow attackers to execute arbitrary code and take control of the affected system.
How can I verify if my system is vulnerable to CVE-2025-21326?
To verify vulnerability to CVE-2025-21326, check if your system is running unsupported versions of Windows Server that do not have the latest security patches.

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source/Microsoft
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collector/mitre-cve
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collector/nvd-api
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vendor/microsoft
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canonical/microsoft windows server 2022 23h2

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