CVE-2026-122171 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.8 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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)	KB5131291
1809 (x64, x86)	KB5131085
21H2 (arm64, x64, x86)	KB5131096
22H2 (arm64, x64, x86)	KB5131096

Windows 11

23H2 (arm64, x64)	KB5131087
24H2 (arm64, x64)	KB5132061
25H2 (arm64, x64)	KB5132061
26H1 (arm64, x64)	KB5132059
26H2 (arm64, x64)	KB5132061

Windows Server 2016

Server Core	KB5131291
Standard	KB5131291

Windows Server 2019

Server Core	KB5131085
Standard	KB5131085

Windows Server 2022

Server Core	KB5131090
Standard	KB5131090

Windows Server 2025

Server Core	KB5131080
Standard	KB5131080

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-2026-122171