CVE-2025-21375: microsoft windows_10_1507 Improper Input Validation
CVSS: 7.8v3.1HighAnalyzed
Published 11-02-2025Last modified 13-02-2026
Vulnerability summary
CVE-2025-21375 is a high (CVSS 7.8) Improper Input Validation vulnerability in microsoft windows_10_1507. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.3% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-02-2025PublishedVulnerability first disclosed.
- 13-02-2026Last modifiedVulnerability information updated.
Description
Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability
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
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.65% on 21-09-2026
21-09-202621-10-2026
EPSS score0.65%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Affected systems
Microsoft35 products
- windows_10_1507< 10.0.10240.20915
- windows_10_1607< 10.0.14393.7785
- windows_10_1809< 10.0.17763.6893
- windows_10_21h2< 10.0.19044.5487
- windows_10_22h2< 10.0.19045.5487
1 vendor · 35 products
