Is CVE-2026-33827 actively exploited?

CVE-2026-33827 has no public evidence of in-the-wild exploitation as of 2026-04-17.

What is the CVSS score for CVE-2026-33827?

CVE-2026-33827 has a CVSS score of 8.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-33827?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33827.

Fix CVE-2026-33827 - HIGH microsoft windows 10 1607

Q: Which products are affected by CVE-2026-33827?

25 products: microsoft windows 10 1607, microsoft windows 10 1607, microsoft windows 10 1809, microsoft windows 10 1809, microsoft windows 10 21h2, and 20 more.

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-362 · Race Condition

Metadata

Primary Vendor: MICROSOFT
Published: 4/14/2026
Last Modified: 4/17/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : windows_10_1607microsoft : windows_10_1607microsoft : windows_10_1809microsoft : windows_10_1809microsoft : windows_10_21h2microsoft : windows_10_21h2microsoft : windows_10_21h2microsoft : windows_10_22h2microsoft : windows_10_22h2microsoft : windows_10_22h2microsoft : windows_11_23h2microsoft : windows_11_23h2microsoft : windows_11_24h2microsoft : windows_11_24h2microsoft : windows_11_25h2microsoft : windows_11_25h2microsoft : windows_11_26h1microsoft : windows_11_26h1microsoft : windows_server_2012microsoft : windows_server_2012microsoft : windows_server_2016microsoft : windows_server_2019microsoft : windows_server_2022microsoft : windows_server_2022_23h2microsoft : windows_server_2025

Remediation Guidance

Executive Summary

View on NIST NVD