Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.
cve CVE-2026-78445 1 source, 1 claim · Watch
NVD writes:
Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network. the claim
Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network. the claim
- Severity
- CRITICAL NVD
- CVSS
- 9.8 NVD
- Fixed in
- 6.2.9200.26349, 6.3.9600.23398, 10.0.14393.9512, 10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438 NVD
- Vendor
- Microsoft NVD
- Product
- Windows Server 2012 NVD
- CWE
- CWE-416 NVD
How far exploitation has got
- No public code known
- Proof of concept
- Proof of concept, verified
- A Metasploit module
- Exploited in the wild
- Used in ransomware campaigns
Timeline
| 2026-09-08 | first spoke of it: Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network. | NVD |
What it is to other things
| affects | microsoft/windows_server_2012 NVD |
| affects | microsoft/windows_server_2016 NVD |
| affects | microsoft/windows_server_2019 NVD |
| affects | microsoft/windows_server_2022 NVD |
| affects | microsoft/windows_server_2025 NVD |
| made_by | microsoft NVD |
Every value, with what each source said and its receipt
| Property | Source | Said | Means here | ||||
|---|---|---|---|---|---|---|---|
| Automatable automatable | NVD | yes An attacker can reliably run all of the kill chain's first four steps without a person. receipt
What the source handed over{
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{
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} | — | ||||
| CVSS cvss | NVD | 9.8receipt
What the source handed over{
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} | — | ||||
| CVSS vector cvss_vector | NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hreceipt
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} | — | ||||
| CWE cwe | NVD | CWE-416receipt
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| Exploitation exploitation | NVD | none No evidence of exploitation, and no public proof of concept. receipt
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} | — | ||||
| Fixed in fixed_in | NVD | 6.2.9200.26349, 6.3.9600.23398, 10.0.14393.9512, 10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438receipt
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| Severity severity | NVD | CRITICAL From the CVSS base score at 9.0 and above. receipt
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| Technical impact technical_impact | NVD | total The attacker gains full control of the component, or all of its information. receipt
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| Vendor vendor | NVD | Microsoftreceipt
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Every claim, by kind
vulnerability
| Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network. zetlyn/cve-nvd · 2026-09-08 | automatable yes cvss 9.8 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H cwe CWE-416 exploitation none fixed_in 6.2.9200.26349, 6.3.9600.23398, 10.0.14393.9512, 10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438 product Windows Server 2012 severity CRITICAL status Analyzed technical_impact total vendor Microsoft | source |