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Unauthenticated Remote Use-After-Free in Microsoft Windows Server 2025 Rates 9.8 CVSS

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-88102

Key Details

CVECVE-2026-88102
CVSS Score / Version
9.8 (Critical) / CVSS v3.1
Updated2026-10-14
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Microsoft Windows Server 2025, Microsoft Windows Server 2019, and Microsoft Windows Server 2022
Classified as
CWE-416 (Use After Free)
Exploitation prediction (EPSS)
0.65% probability of exploitation in the next 30 days (50% percentile) -- FIRST.org's EPSS model.

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows Server 2025
MicrosoftWindows Server 2019
MicrosoftWindows Server 2022
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

What to Do

Monitor Microsoft's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-88102
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-88102

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