CVE-2026-78445
Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2026-78445 is fixed in 12 products on 1 platform, first by KB5123099, released September 8, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
Urgent
CVSS
9.8
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0097
62nd percentile
<p>Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows Server 2012 | KB5123065 | Sep 8, 2026 | |
| Windows Server 2012 (Server Core installation) | KB5123065 | Sep 8, 2026 | |
| Windows Server 2012 R2 | KB5123066 | Sep 8, 2026 | |
| Windows Server 2012 R2 (Server Core installation) | KB5123066 | Sep 8, 2026 | |
| Windows Server 2016 | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows Server 2016 (Server Core installation) | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows Server 2019 | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows Server 2022 | 20348.5622 | KB5122882 | Sep 8, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5622 | KB5122882 | Sep 8, 2026 |
| Windows Server 2025 | 26100.33438 | KB5122871 | Sep 8, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.33438 | KB5122871 | Sep 8, 2026 |