Applied Cybernetics Group
Threat intel → detection pipeline
Tuesday, July 14, 2026
Data as of 20:11 UTC

Microsoft Windows Improper Input Validation Vulnerability

Added to KEV
2022-03-03
Federal due date
2022-03-24
Vendor
Microsoft
Product
Windows
EPSS
91.1th percentile (score 0.049, as of 2026-07-13)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2009-1123

CISA short description

The kernel in Microsoft Windows does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.