CVE-2026-88102CWE-416

CVE-2026-88102

Critical · published October 13, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
49.7
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00634 · 49.7th percentile
Weakness
CWE-416 · Use After Free
Published
2026-10-13T23:21Z
Affected products (3)
ProductVersionsFixed in
microsoft/windows_server_2019< 10.0.17763.937610.0.17763.9376
microsoft/windows_server_2022< 10.0.20348.576110.0.20348.5761
microsoft/windows_server_2025< 10.0.26100.3365010.0.26100.33650
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88102 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 1%
    epss
  • 13 OCT 19:00Z
    Microsoft Failover Cluster Remote Code Execution Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Microsoft Failover Cluster Remote Code Execution Vulnerability
    cvelistv5