CVE-2025-21317: microsoft windows_10_21h2
CVSS: 5.5v3.1MediumAnalyzed
Published 14-01-2025Last modified 09-06-2026
Vulnerability summary
CVE-2025-21317 is a medium (CVSS 5.5) vulnerability in microsoft windows_10_21h2. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59.2% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.90%
0%100%
Low · +0.05 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 Kernel Memory Information Disclosure Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.90%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
+0.05 pp
From 0.85% on 21-09-2026
21-09-202621-10-2026
EPSS score0.90%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft16 products
- windows_10_21h2< 10.0.19044.5371
- windows_10_22h2< 10.0.19045.5371
- windows 10 version 21h2≥ 10.0.19044.0, < 10.0.19044.5371
- windows 10 version 22h2≥ 10.0.19045.0, < 10.0.19045.5371
- windows_11_22h2< 10.0.22621.4751
1 vendor · 16 products
