Applied Cybernetics Group
Threat intel → detection pipeline
Friday, September 18, 2026
Data as of 13:09 UTC

Microsoft Windows Runtime Remote Code Execution Vulnerability

Added to KEV
2022-08-18
Federal due date
2022-09-08
Vendor
Microsoft
Product
Windows
EPSS
98.9th percentile (score 0.539, as of 2026-09-16)
NVD CVSS v3.1
Ransomware use
Unknown
ATT&CK
T1059 , T1204.001 · signal rollup
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2022-21971

CISA short description

Microsoft Windows Runtime contains an unspecified vulnerability that allows for remote code execution.

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.