CVE-2026-40399
HIGH EPSS 24.6%
Published May 12, 20261mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
Published May 12, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
24.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-121
Affected Products 23
| Vendor | Product | Version | Range |
|---|---|---|---|
| microsoft | windows_10_1607 | * | <10.0.14393.9140 |
| microsoft | windows_10_1607 | * | <10.0.14393.9140 |
| microsoft | windows_10_1809 | * | <10.0.17763.8755 |
| microsoft | windows_10_1809 | * | <10.0.17763.8755 |
| microsoft | windows_10_21h2 | * | <10.0.19044.7291 |
| microsoft | windows_10_21h2 | * | <10.0.19044.7291 |
| microsoft | windows_10_21h2 | * | <10.0.19044.7291 |
| microsoft | windows_10_22h2 | * | <10.0.19045.7291 |
| microsoft | windows_10_22h2 | * | <10.0.19045.7291 |
| microsoft | windows_10_22h2 | * | <10.0.19045.7291 |
| microsoft | windows_11_23h2 | * | <10.0.22631.7079 |
| microsoft | windows_11_23h2 | * | <10.0.22631.7079 |
| microsoft | windows_11_24h2 | * | <10.0.26100.8390 |
| microsoft | windows_11_24h2 | * | <10.0.26100.8390 |
| microsoft | windows_11_25h2 | * | <10.0.26200.8390 |
| microsoft | windows_11_25h2 | * | <10.0.26200.8390 |
| microsoft | windows_11_26h1 | * | <10.0.28000.2113 |
| microsoft | windows_11_26h1 | * | <10.0.28000.2113 |
| microsoft | windows_server_2016 | * | <10.0.14393.9140 |
| microsoft | windows_server_2019 | * | <10.0.17763.8755 |
| microsoft | windows_server_2022 | * | <10.0.20348.5074 |
| microsoft | windows_server_2022_23h2 | * | <10.0.25398.2330 |
| microsoft | windows_server_2025 | * | <10.0.26100.32772 |
References 1
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40399
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.