CVE-2021-26877
CRITICALCVSS 9.8/10EPSS 19.27%
Last modified
CVE-2021-26877 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Windows DNS Server Remote Code Execution Vulnerability. EPSS estimates a 19.27% chance of exploitation in the next 30 days.
Description
Windows DNS Server Remote Code Execution Vulnerability
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows Server 2008 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | r2 | Sp1 |
| Microsoft | Windows Server 2012 | All versions | — |
| Microsoft | Windows Server 2012 | r2 | — |
| Microsoft | Windows Server 2016 | All versions | — |
| Microsoft | Windows Server 2016 | 20h2 | — |
| Microsoft | Windows Server 2016 | 1909 | — |
| Microsoft | Windows Server 2016 | 2004 | — |
| Microsoft | Windows Server 2019 | All versions | — |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26877Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26877Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26877?
Windows DNS Server Remote Code Execution Vulnerability
How severe is CVE-2021-26877?
CVE-2021-26877 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 19.27% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26877?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-26877?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST