Improper access control in Microsoft Malware Protection Engine - CVE-2026-69414
Published: August 17, 2026
Vulnerability identifier: #VU143636
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69414
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper access control in Microsoft Malware Protection Engine when handling crafted local interactions. A local user can exploit the flaw to escalate privileges.
Note, the vulnerability was dubbed ShieldBreak.
Affected software
Microsoft Malware Protection Engine
How to mitigate CVE-2026-69414
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.