CVE-2026-33839 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7 HIGH	LOCAL	HIGH	LOW	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Windows Releases

Platform

Version

Windows 10

1809 (x64, x86)	KB5087538
21H2 (arm64, x64, x86)	KB5087544
22H2 (arm64, x64, x86)	KB5087544

Windows 11

23H2 (arm64, x64)	KB5087420
24H2 (arm64, x64)	KB5089549
25H2 (arm64, x64)	KB5089549
26H1 (arm64, x64)	KB5089548

Windows Server 2019

Server Core	KB5087538
Standard	KB5087538

Windows Server 2022

23H2 Server Core	KB5087541
Server Core	KB5087545
Standard	KB5087545

Windows Server 2025

Server Core	KB5087539
Standard	KB5087539

Common Weakness Enumeration

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The program contains a code sequence that can run concurrently with other code, and the code sequence 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 that is operating concurrently.

Vulnerability Media Exposure

[ENGLISH] Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-days
Today is Microsoft's May 2026 Patch Tuesday, with security updates for 120 flaws and no zero-days disclosed this month. [...]
Published: 2026-05-12T14:08:06-04:00

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33839