CVE-2023-38166: Layer 2 Tunneling Protocol Remote Code Execution Vulnerability
Vulnerability summary
CVE-2023-38166 is a high (CVSS 8.1) Use After Free vulnerability in microsoft windows_10_1507. EPSS estimates a 1.30% chance of exploitation in the next 30 days, higher than 70.5% of scored vulnerabilities.
Severe, CVSS 8.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 10-10-2023PublishedVulnerability first disclosed.
- 14-04-2025Last modifiedVulnerability information updated.
Description
Layer 2 Tunneling Protocol Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.30%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
Increase +0.05 pp
From 1.26% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
- CWE-362Concurrent Execution using Shared Resource with Improper SynchronizationThe 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
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Microsoft29 products
- windows_10_1507< 10.0.10240.20232
- windows_10_1607< 10.0.14393.6351
- windows_10_1809< 10.0.17763.4974
- windows_10_21h2< 10.0.19041.3570
- windows_10_22h2< 10.0.19045.3570
1 vendor · 29 products
