cbcvebase.
CVE-2021-43228
published 2021-12-15

CVE-2021-43228: SymCrypt Denial of Service Vulnerability SymCrypt Denial of Service Vulnerability

high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.66%
88.4th percentile
SymCrypt Denial of Service Vulnerability SymCrypt Denial of Service Vulnerability

Affected

22 ranges
VendorProductVersion rangeFixed in
microsoftwindows_10_version_1809>= 10.0.0 < 10.0.17763.236610.0.17763.2366
microsoftwindows_10_version_1909>= 10.0.0 < 10.0.18363.197710.0.18363.1977
microsoftwindows_10_version_2004>= 10.0.0 < 10.0.19041.141510.0.19041.1415
microsoftwindows_10_version_20h2>= 10.0.0 < 10.0.19042.141510.0.19042.1415
microsoftwindows_10_version_21h1>= 10.0.0 < 10.0.19043.141510.0.19043.1415
microsoftwindows_10_version_21h2>= 10.0.0 < 10.0.19044.141510.0.19044.1415
microsoftwindows_11_version_21h2>= 10.0.0 < 10.0.22000.37610.0.22000.376
microsoftwindows_server_2019>= 10.0.0 < 10.0.17763.236610.0.17763.2366
microsoftwindows_server_2022>= 10.0.0 < 10.0.20348.40510.0.20348.405
microsoftwindows_server_version_2004>= 10.0.0 < 10.0.19041.141510.0.19041.1415
microsoftwindows_server_version_20h2>= 10.0.0 < 10.0.19042.141510.0.19042.1415
msrcwindows_10_version_1809
msrcwindows_10_version_1909
msrcwindows_10_version_2004
msrcwindows_10_version_20h2
msrcwindows_10_version_21h1
msrcwindows_10_version_21h2
msrcwindows_11_version_21h2
msrcwindows_server_2019
msrcwindows_server_2022
msrcwindows_server_version_2004
msrcwindows_server_version_20h2

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.07.8HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
cvelistv57.5HIGH
vendor_msrc7.5HIGH
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.