What is CVE-2025-49666?

CVE-2025-49666 is a security advisory published by Microsoft with High severity. EchelonGraph links Microsoft's advisory rather than copying its page; it is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49666.

Which CVE IDs does CVE-2025-49666 cover?

CVE-2025-49666 covers the following CVE IDs: CVE-2025-49666. Each CVE has its own detail page on EchelonGraph Pulse with its EchelonGraph score.

What is the CVSS v3 score of CVE-2025-49666?

CVE-2025-49666 has a CVSS v3 base score of 7.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-49666?

CVE-2025-49666 affects 9 products, including: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; and others — see the full list on the advisory page.

How do I remediate CVE-2025-49666?

Microsoft lists 5 KB articles for CVE-2025-49666: KB5062557, KB5062572, KB5062553, KB5062570, KB5062560. Each is listed on this page with its fixed build; Microsoft's advisory is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49666.

CVE-2025-49666HighMicrosoft CVSS 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2025-49666 — Windows Server

Vendor

Microsoft Security Response Center (MSRC)

Published

July 8, 2025

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-49666 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49666. This page also shows what EchelonGraph holds for CVE-2025-49666, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products9

Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Updates Microsoft lists: 5 KB articles

5 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB article	Update	Fixed build
KB5062557	Security Update	10.0.17763.7558
KB5062572	Security Update	10.0.20348.3932
KB5062553	Security Update	10.0.26100.4652
KB5062570	Security Update	10.0.25398.1732
KB5062560	Security Update	10.0.14393.8246

🧭 EchelonGraph on CVE-2025-49666

EchelonGraph score: 7.2 HIGH
CISA KEV: Not listed
Fix status: A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2025-49666, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 CVE IDs covered (1)

📋 Microsoft's advisory

🎯 Affected products9

✅ Updates Microsoft lists: 5 KB articles

🧭 EchelonGraph on CVE-2025-49666

🔗 References (11)