CVE-2021-26877
Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26877 is fixed in 17 products on 1 platform, first by KB5000803, released March 9, 2021. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.
Urgent
CVSS
9.8
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1729
97th percentile
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB5000841 | Mar 9, 2021 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB5000851 | Mar 9, 2021 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB5000841 | Mar 9, 2021 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB5000851 | Mar 9, 2021 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 | KB5000856 | Mar 9, 2021 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 | KB5000844 | Mar 9, 2021 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | KB5000856 | Mar 9, 2021 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | KB5000844 | Mar 9, 2021 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 | KB5000856 | Mar 9, 2021 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 | KB5000844 | Mar 9, 2021 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | KB5000856 | Mar 9, 2021 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | KB5000844 | Mar 9, 2021 | |
| Windows Server 2012 | KB5000840 | Mar 9, 2021 | |
| Windows Server 2012 | KB5000847 | Mar 9, 2021 | |
| Windows Server 2012 (Server Core installation) | KB5000840 | Mar 9, 2021 | |
| Windows Server 2012 (Server Core installation) | KB5000847 | Mar 9, 2021 | |
| Windows Server 2012 R2 | KB5000853 | Mar 9, 2021 | |
| Windows Server 2012 R2 | KB5000848 | Mar 9, 2021 | |
| Windows Server 2012 R2 (Server Core installation) | KB5000853 | Mar 9, 2021 | |
| Windows Server 2012 R2 (Server Core installation) | KB5000848 | Mar 9, 2021 | |
| Windows Server 2016 | 14393.4283 | KB5000803 | Mar 9, 2021 |
| Windows Server 2016 (Server Core installation) | 14393.4283 | KB5000803 | Mar 9, 2021 |
| Windows Server 2019 | 17763.1817 | KB5000822 | Mar 9, 2021 |
| Windows Server 2019 (Server Core installation) | 17763.1817 | KB5000822 | Mar 9, 2021 |
| Windows Server, version 1909 (Server Core installation) | 18363.1440 | KB5000808 | Mar 9, 2021 |
| Windows Server, version 2004 (Server Core installation) | KB5000802 | Mar 9, 2021 | |
| Windows Server, version 20H2 (Server Core Installation) | KB5000802 | Mar 9, 2021 | |
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