What is CVE-2026-62878?

CVE-2026-62878 is a security advisory published by Microsoft with Critical severity. EchelonGraph links Microsoft's advisory rather than copying its page; it is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62878.

Which CVE IDs does CVE-2026-62878 cover?

CVE-2026-62878 covers the following CVE IDs: CVE-2026-62878. Each CVE has its own detail page on EchelonGraph Pulse with its EchelonGraph score.

What is the CVSS v3 score of CVE-2026-62878?

CVE-2026-62878 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-62878?

CVE-2026-62878 affects 12 products, including: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows Server 2016; and others — see the full list on the advisory page.

How do I remediate CVE-2026-62878?

Microsoft lists 8 KB articles for CVE-2026-62878: KB5120238, KB5120242, KB5120229, KB5120233, KB5120228, KB5120418, KB5120386, KB5120385. Each is listed on this page with its fixed build; Microsoft's advisory is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62878.

CVE-2026-62878CriticalMicrosoft CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-62878 — Windows Server

Vendor

Microsoft Security Response Center (MSRC)

Published

August 14, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-62878 →

📋 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-2026-62878. This page also shows what EchelonGraph holds for CVE-2026-62878, 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 products12

Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
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 2025
Windows Server 2025 (Server Core installation)

✅ Updates Microsoft lists: 8 KB articles

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

KB article	Update	Fixed build
KB5120238	Security Update	10.0.17763.9121
KB5120242	Security Update	10.0.20348.5499
KB5120229	Security Hotpatch Update	10.0.20348.5440
KB5120233	Security Update	10.0.26100.33296
KB5120228	Security Hotpatch Update	10.0.26100.33222
KB5120418	Security Update	10.0.14393.9418
KB5120386	Monthly Rollup	6.2.9200.26280
KB5120385	Monthly Rollup	6.3.9600.23338

🧭 EchelonGraph on CVE-2026-62878

EchelonGraph score: 9.8 CRITICAL
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

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

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-62878, 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 products12

✅ Updates Microsoft lists: 8 KB articles

🧭 EchelonGraph on CVE-2026-62878

🔗 References (17)