CVE-2025-21376: microsoft windows_10_1507 Heap-based Buffer Overflow
CVSS: 8.1v3.1HighAnalyzed
Published 11-02-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-21376 is a high (CVSS 8.1) Heap-based Buffer Overflow vulnerability in microsoft windows_10_1507. EPSS estimates a 9.31% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (CVE.org)EPSS score
9.31%
0%100%
Low · -0.08 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-02-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
Windows Lightweight Directory Access Protocol (LDAP) 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
9.31%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
-0.08 pp
From 9.39% on 22-09-2026
22-09-202622-10-2026
EPSS score9.31%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- 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().
- CWE-191Integer Underflow (Wrap or Wraparound)The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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
