Out-of-bounds write in Microsoft Windows - CVE-2026-105005
Published: October 13, 2026
Vulnerability identifier: #VU154322
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-105005
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to an out-of-bounds write in Windows Schannel when processing network packets. A remote attacker can send a specially crafted packet to an affected service to execute arbitrary code.
Successful exploitation requires a deep understanding of the system and the ability to manipulate its components to trigger a specific condition. No user interaction is required.
Affected software
Microsoft Windows
How to mitigate CVE-2026-105005
Install security update from vendor's website.
Microsoft Windows - update to 11 26H1 10.0.28000.3231