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CVE-2025-49666

Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability

HIGH
7.2
CVSS Score
Published: July 8, 2025 at 04:57 PM UTC
Updated: June 17, 2026 at 09:31 AM UTC
6 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2022

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Severity
HIGH7.2
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows Server 2016· Microsoft
95%
v < 10.0.14393.824610.0.14393.0 ≤ v < 10.0.14393.824610.0.14393.0
Affected range stops below 10.0.14393.8246, so it looks safe — our inference, not a vendor statement
Windows Server 2019· Microsoft
95%
v < 10.0.17763.755810.0.17763.0 ≤ v < 10.0.17763.755810.0.17763.0
Affected range stops below 10.0.17763.7558, so it looks safe — our inference, not a vendor statement
Windows Server 2022· Microsoft
95%
v < 10.0.20348.393210.0.20348.0 ≤ v < 10.0.20348.393210.0.20348.0
Affected range stops below 10.0.20348.3932, so it looks safe — our inference, not a vendor statement
Windows Server 2022 23H2· Microsoft
95%
v < 10.0.25398.173210.0.25398.0 ≤ v < 10.0.25398.173210.0.25398.0
Affected range stops below 10.0.25398.1732, so it looks safe — our inference, not a vendor statement
Windows Server 2025· Microsoft
95%
v < 10.0.26100.465210.0.26100.0 ≤ v < 10.0.26100.465210.0.26100.0
Affected range stops below 10.0.26100.4652, so it looks safe — our inference, not a vendor statement
Windows Server 23H2· Microsoft
95%
10.0.25398.0 ≤ v < 10.0.25398.1732
Affected range stops below 10.0.25398.1732, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49666

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-122

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