Out-of-bounds read in Microsoft Windows and Windows Server - CVE-2026-69919
Published: October 13, 2026
Vulnerability identifier: #VU154446
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69919
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose initialized or uninitialized memory in the process heap.
The vulnerability exists due to an out-of-bounds read in Windows Cryptographic Services when accessing process heap memory. A local user can read memory beyond its intended bounds to disclose initialized or uninitialized memory in the process heap.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-69919
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - update to 2025 10.0.26100.33650
Windows Server - update to 2025 10.0.26100.33650