Integer underflow in Microsoft Windows and Windows Server - CVE-2026-119908
Published: November 11, 2026
Vulnerability identifier: #VU165333
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119908
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on an affected system.
The vulnerability exists due to integer underflow in Windows Storage Spaces Controller when processing network-supplied input. A remote attacker can supply specially crafted input over a network that, with user interaction, triggers the underflow to execute arbitrary code.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-119908
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822
Windows Server - addressed in versions 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822