CRITICAL
Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
Published Aug 12, 2021
9.8
CRITICALCVSS 3.1
EPSS 11.34%
Description
Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
Affected products
-
- Version 10.0.10240.0StatusaffectedConstraints<10.0.10240.19022
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.4583
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.17763.2114
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.2114
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.18363.1734
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19041.1165
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19042.1165
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19043.1165
- Version
-
- Version 6.3.0StatusaffectedConstraints<6.3.9600.20094
- Version
-
- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.23435
- Version
-
- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.23435
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.20094
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.20094
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.4583
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.4583
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.2114
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.2114
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19041.1165
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19042.1165
- 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 10 Version 1507 | n/a |
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| Microsoft | Windows 10 Version 1607 | n/a |
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| Microsoft | Windows 10 Version 1809 | n/a |
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| Microsoft | Windows 10 Version 1909 | n/a |
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| Microsoft | Windows 10 Version 2004 | n/a |
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| Microsoft | Windows 10 Version 20H2 | n/a |
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| Microsoft | Windows 10 Version 21H1 | n/a |
| |||||||||
| Microsoft | Windows 8.1 | n/a |
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| 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 |
| |||||||||
| Microsoft | Windows Server version 2004 | n/a |
| |||||||||
| Microsoft | Windows Server version 20H2 | n/a |
|
OR
- n/a
- 20h2
- 21h1
- 1607
- 1809
- 1909
- 2004
- n/a
- n/a
- n/a
- r2
- n/a
- 20h2
- 2004
- n/a
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.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (CVE.org) ▾
9.8 CRITICAL CVE.org
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
Exploit Maturity Unreported
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
11.34% 0.11343
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.11343
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (42 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 11.34% (0.11343) | 95.87th | v5 (v2026.06.15) |
| Aug 11, 2026 | 11.34% (0.11343) | 95.58th | v5 (v2026.06.15) |
| Jun 15, 2026 | 10.33% (0.10326) | 95.10th | v5 (v2026.06.15) |
| May 12, 2026 | 8.08% (0.08078) | 92.20th | v4 (v2025.03.14) |
| Nov 21, 2025 | 10.29% (0.10285) | 92.87th | v4 (v2025.03.14) |
| Nov 18, 2025 | 13.20% (0.13203) | 93.49th | v4 (v2025.03.14) |
| Jun 3, 2025 | 10.21% (0.10206) | 92.77th | v4 (v2025.03.14) |
| May 14, 2025 | 8.34% (0.08342) | 91.81th | v4 (v2025.03.14) |
| May 12, 2025 | 6.57% (0.06571) | 90.62th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.33% (0.04328) | 87.84th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.25% (0.09252) | 87.76th | v4 (v2025.03.14) |
| Mar 19, 2025 | 4.33% (0.04328) | 87.55th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.77% (0.01767) | 81.38th | v4 (v2025.03.14) |
| Dec 17, 2024 | 6.07% (0.06068) | 93.43th | v3 (v2023.03.01) |
| Dec 12, 2024 | 4.65% (0.04652) | 92.89th | v3 (v2023.03.01) |
| Jul 18, 2024 | 4.45% (0.04447) | 92.52th | v3 (v2023.03.01) |
| May 23, 2024 | 4.22% (0.04224) | 92.25th | v3 (v2023.03.01) |
| Apr 27, 2024 | 4.51% (0.04508) | 92.38th | v3 (v2023.03.01) |
| Mar 18, 2024 | 4.32% (0.04321) | 92.12th | v3 (v2023.03.01) |
| Feb 8, 2024 | 4.05% (0.04050) | 91.78th | v3 (v2023.03.01) |
| Jan 25, 2024 | 4.58% (0.04576) | 91.72th | v3 (v2023.03.01) |
| Dec 29, 2023 | 4.42% (0.04423) | 91.53th | v3 (v2023.03.01) |
| Dec 14, 2023 | 3.59% (0.03588) | 90.65th | v3 (v2023.03.01) |
| Nov 16, 2023 | 2.86% (0.02865) | 89.65th | v3 (v2023.03.01) |
| Nov 4, 2023 | 2.13% (0.02127) | 88.00th | v3 (v2023.03.01) |
| Sep 22, 2023 | 2.32% (0.02318) | 88.41th | v3 (v2023.03.01) |
| Sep 8, 2023 | 2.00% (0.02000) | 87.44th | v3 (v2023.03.01) |
| Jul 28, 2023 | 1.61% (0.01608) | 85.73th | v3 (v2023.03.01) |
| Jun 1, 2023 | 1.68% (0.01676) | 85.84th | v3 (v2023.03.01) |
| May 17, 2023 | 1.47% (0.01470) | 84.77th | v3 (v2023.03.01) |
| Mar 20, 2023 | 1.51% (0.01512) | 84.93th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.26% (0.01261) | 83.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.88% (0.01875) | 77.30th | v2 (v2022.01.01) |
| Feb 28, 2023 | 1.88% (0.01875) | 77.28th | v2 (v2022.01.01) |
| Oct 31, 2022 | 1.73% (0.01728) | 75.53th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.60% (0.01601) | 73.51th | v2 (v2022.01.01) |
| Feb 4, 2022 | 22.24% (0.22240) | 94.36th | v2 (v2022.01.01) |
| Feb 3, 2022 | 32.21% (0.32208) | 97.60th | v1 |
| Jan 6, 2022 | 32.21% (0.32208) | 97.57th | v1 |
| Sep 1, 2021 | 9.57% (0.09575) | 94.86th | v1 |
| Aug 24, 2021 | 9.57% (0.09575) | 0.00th | v1 |
| Aug 13, 2021 | 0.92% (0.00918) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (2)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26432 vendor-advisorypatch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26432 PatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26432 | vendor-advisorypatch | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26432 | PatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Aug 12, 2021
Updated Aug 10, 2026
Reserved Jan 29, 2021
Link CVE-2021-26432
CISA Vulnrichment
Updated n/a