CVE-2021-26879
published 2021-03-11CVE-2021-26879: Windows Network Address Translation (NAT) Denial of Service Vulnerability
PriorityP335high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.87%
90.1th percentile
Windows Network Address Translation (NAT) Denial of Service Vulnerability
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.18874 | 10.0.10240.18874 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.4283 | 10.0.14393.4283 |
| microsoft | windows_10_version_1803 | >= 10.0.0 < 10.0.17134.2087 | 10.0.17134.2087 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.1817 | 10.0.17763.1817 |
| microsoft | windows_10_version_1909 | >= 10.0.0 < 10.0.18363.1440 | 10.0.18363.1440 |
| microsoft | windows_10_version_2004 | >= 10.0.0 < 10.0.19043.867 | 10.0.19043.867 |
| microsoft | windows_8.1 | >= 6.3.0 < 6.3.9600.19968 | 6.3.9600.19968 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.19968 | 6.3.9600.19968 |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.4283 | 10.0.14393.4283 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.1817 | 10.0.17763.1817 |
| microsoft | windows_server_version_2004 | >= 10.0.0 < 10.0.19043.867 | 10.0.19043.867 |
| microsoft | windows_server_version_20h2 | >= 10.0.0 < 10.0.19043.867 | 10.0.19043.867 |
| msrc | windows_10_for_x64-based_systems | — | — |
| msrc | windows_10_version_1607_for_x64-based_systems | — | — |
| msrc | windows_10_version_1803_for_x64-based_systems | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
vendor_msrc7.5HIGH
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Microsoft
Windows Network Address Translation (NAT) Denial of Service Vulnerability
vendor_msrc·2021-03-09·CVSS 7.5
CVE-2021-26879 [HIGH] Windows Network Address Translation (NAT) Denial of Service Vulnerability
Windows Network Address Translation (NAT) Denial of Service Vulnerability
Role: Windows Hyper-V: Role: Windows Hyper-V
Microsoft: Microsoft
Impact: Denial of Service
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely;DOS:N/A
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5000809
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5000822
Reference: https://support.microsoft.com/help/5000822
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5000808
Reference: https://support.microsoft.com/help/5000808
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5000802
Reference: https://support.microsoft.co
VulDB
Microsoft Windows up to Server 2019 NAT denial of service
vuldb·2026-08-20·CVSS 7.5
CVE-2021-26879 [HIGH] Microsoft Windows up to Server 2019 NAT denial of service
A vulnerability, which was classified as critical, has been found in Microsoft Windows. Impacted is an unknown function of the component NAT. The manipulation leads to denial of service.
This vulnerability is documented as CVE-2021-26879. The attack can be initiated remotely. There is not any exploit available.
To fix this issue, it is recommended to deploy a patch.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-03-11
Published