CVE-2021-26897: microsoft windows_server_2008
CVSS: 10.0v2.0HighModified
Published 11-03-2021Last modified 19-08-2026
Vulnerability summary
CVE-2021-26897 is a high (CVSS 10.0) vulnerability in microsoft windows_server_2008. EPSS estimates a 11.64% chance of exploitation in the next 30 days, higher than 96% of scored vulnerabilities.
CVSS score
10.0/10
010
High · v2.0 (NVD)EPSS score
11.64%
0%100%
Medium · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-03-2021PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
Windows DNS Server Remote Code Execution Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 10.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
11.64%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 11.64% on 21-09-2026
21-09-202621-10-2026
EPSS score11.64%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft16 products
- windows_server_2008r2:sp1 | sp2
- windows server 2008 r2 service pack 1≥ 6.1.7601.0, < 6.1.7601.24566
- windows server 2008 r2 service pack 1 (server core installation)≥ 6.1.7601.0, < 6.1.7601.24566
- windows server 2008 service pack 2≥ 6.0.6003.0, < 6.0.6003.21070
- windows server 2008 service pack 2 (server core installation)≥ 6.0.6003.0, < 6.0.6003.21070
1 vendor · 16 products
References
2 links- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26897X Refsource MISCX TransferredPatchVendor Advisory