CVE-2025-21204: microsoft windows_10_1507 Link Following
CVSS: 7.8v3.1HighAnalyzed
Published 08-04-2025Last modified 10-08-2026
Vulnerability summary
CVE-2025-21204 is a high (CVSS 7.8) Link Following vulnerability in microsoft windows_10_1507. EPSS estimates a 7.00% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
7.00%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-04-2025PublishedVulnerability first disclosed.
- 10-08-2026Last modifiedVulnerability information updated.
Description
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
7.00%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.00% on 19-09-2026
19-09-202619-10-2026
EPSS score7.00%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft35 products
- windows_10_1507< 10.0.10240.20978
- windows_10_1607< 10.0.14393.7969
- windows_10_1809< 10.0.17763.7136
- windows_10_21h2< 10.0.19044.5737
- windows_10_22h2< 10.0.19045.5737
1 vendor · 35 products
References
3 links
- www.vicarius.io/vsociety/…Mitigation
- www.vicarius.io/vsociety/…Tool Signature