Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
Published Sep 8, 2026
9.8
CRITICALCVSS 3.1
EPSS 0.97%
Description
Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.
Affected products
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- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.26349
- Version
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- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.26349
- Version
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- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.23398
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.23398
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.9512
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.9512
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.9245
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.9245
- Version
-
- Version 10.0.20348.0StatusaffectedConstraints<10.0.20348.5622
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.33438
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.33438
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows Server 2012 | n/a |
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| Microsoft | Windows Server 2012 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2012 R2 | n/a |
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| Microsoft | Windows Server 2012 R2 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2016 | n/a |
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| Microsoft | Windows Server 2016 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2019 | n/a |
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| Microsoft | Windows Server 2019 (Server Core installation) | n/a |
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| Microsoft | Windows Server 2022 | n/a |
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| Microsoft | Windows Server 2025 | n/a |
| ||||||
| Microsoft | Windows Server 2025 (Server Core installation) | n/a |
|
- n/a
- r2
- < 10.0.14393.9512
- < 10.0.17763.9245
- < 10.0.20348.5622
- < 10.0.26100.33438
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Sep 9, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.97% (0.00974) | 60.69th | v5 (v2026.06.15) |
| Sep 9, 2026 | 0.91% (0.00910) | 57.87th | v5 (v2026.06.15) |
References (1)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445 vendor-advisorypatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445 | vendor-advisorypatchVendor Advisory |
Change history (0)
No recorded changes yet.