CVE-2025-21309: microsoft windows server 2012
CVSS: 8.1v3.1HighAnalyzed
Published 14-01-2025Last modified 09-06-2026
Vulnerability summary
CVE-2025-21309 is a high (CVSS 8.1) vulnerability in microsoft windows server 2012. EPSS estimates a 15.06% chance of exploitation in the next 30 days, higher than 96.7% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (CVE.org)EPSS score
15.06%
0%100%
Medium · +0.20 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 14-01-2025PublishedVulnerability first disclosed.
- 09-06-2026Last modifiedVulnerability information updated.
Description
Windows Remote Desktop Services Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
15.06%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
+0.20 pp
From 14.86% on 21-09-2026
21-09-202621-10-2026
EPSS score15.06%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft13 products
- windows server 2012≥ 6.2.9200.0, < 6.2.9200.25273 | na | r2
- windows server 2012 r2≥ 6.3.9600.0, < 6.3.9600.22371
- windows server 2012 r2 (server core installation)≥ 6.3.9600.0, < 6.3.9600.22371
- windows server 2012 (server core installation)≥ 6.2.9200.0, < 6.2.9200.25273
- windows server 2016≥ 10.0.14393.0, < 10.0.14393.7699 | < 10.0.14393.7699
1 vendor · 13 products
