CVE-2026-88239 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/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

1607 (x64, x86)	KB5123099
1809 (x64, x86)	KB5122876
21H2 (arm64, x64, x86)	KB5122878
22H2 (arm64, x64, x86)	KB5122878

Windows 11

23H2 (arm64, x64)	KB5122880
24H2 (arm64, x64)	KB5124008
25H2 (arm64, x64)	KB5124008
26H1 (arm64, x64)	KB5124012

Windows Server 2016

Server Core	KB5123099
Standard	KB5123099

Windows Server 2019

Server Core	KB5122876
Standard	KB5122876

Windows Server 2022

Server Core	KB5122882
Standard	KB5122882

Windows Server 2025

Server Core	KB5122871
Standard	KB5122871

Common Weakness Enumeration

CWE-122 - Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Vulnerability Media Exposure

[ENGLISH] Microsoft November 2026 Patch Tuesday fixes 1,235 flaws, Outlook zero-day
Today is Microsoft's November 2026 Patch Tuesday, with security updates addressing a record-breaking 1,235 flaws, including one actively exploited Microsoft Outlook zero-day vulnerability. [...]
Published: 2026-11-10T14:07:36-05:00

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88239