CVE-2026-78445CWE-416

CVE-2026-78445

Critical · published September 8, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
61.5
In the wild
Unconfirmed
What it is

Use after free in Windows Services for NFS ONCRPC XDR Driver 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
0.00974 · 61.5th percentile
Weakness
CWE-416 · Use After Free
Published
2026-09-08T22:20Z
Affected products (6)
ProductVersionsFixed in
microsoft/windows_server_2012all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2016< 10.0.14393.951210.0.14393.9512
microsoft/windows_server_2019< 10.0.17763.924510.0.17763.9245
microsoft/windows_server_2022< 10.0.20348.562210.0.20348.5622
microsoft/windows_server_2025< 10.0.26100.3343810.0.26100.33438
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:18Z
    Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
    cvelistv5