Detections
Analytics

CVE-2026-69414

high

Description

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414

https://www.darkreading.com/vulnerabilities-threats/nightmare-eclipse-strikes-again-shieldcrash-windows-exploit

https://www.helpnetsecurity.com/2026/09/09/september-2026-patch-tuesday-zero-days-sigred-successor/

https://thehackernews.com/2026/09/researcher-releases-falconflank-poc.html

https://www.securityweek.com/microsoft-rolls-out-22-fresh-security-patches/

https://github.com/1neptune/ShieldBreak

https://github.com/MSNightmare/ShieldBreak

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-58811

Details

Source: Mitre, NVD

Published: 2026-08-14

Updated: 2026-09-03

Named Vulnerability: ShieldBreak

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00327

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored