Resource exhaustion in Microsoft Windows 10 Version 21h2
CVE-2026-69374
Allocation of resources without limits or throttling in Windows SMB Server allows an authorized attacker to deny service over a network.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Microsoft Windows 10 Version 21h2
- Microsoft Windows 10 Version 22h2
- Microsoft Windows 11 Version 23h2
- Microsoft Windows 11 Version 24h2
- Microsoft Windows 11 Version 25h2
- Microsoft Windows 11 Version 26h1
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core Installation)
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-69374?
- CVE-2026-69374 is a medium-severity vulnerability in Microsoft Windows 10 Version 21h2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-09-08.
- How severe is CVE-2026-69374?
- Medium severity. CVSS v3 base score is 6.5 out of 10.