CVE-2022-21971 | Windows Runtime Remote Code Execution Vulnerability

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Windows Runtime Remote Code Execution Vulnerability

Published: 2022-02-09 Last update: 2025-10-30 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-21971 is rated Critical Active Threat (91.7/100): CVSS High severity, with high exploitation likelihood (EPSS 87.79%, 99th percentile). CISA KEV confirms active exploitation (added 2022-08-18) affecting Microsoft / Windows. a weakness (CWE-824) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2022-21971

Name: Microsoft Windows Runtime Remote Code Execution Vulnerability · CISA KEV detail

Exploit added: 2022-08-18

Action due: 2022-09-08

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2022-21971

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-14 87.06% 87.79% +0.73%
2 2026-02-07 86.94% 87.06% +0.13%
3 2026-01-08 — 86.94% —

Full EPSS history (69 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-21971

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2022-21971

Affected software / configurations for CVE-2022-21971

Vendor Product Version Raw CPE
microsoft windows_10_1809 < 10.0.17763.2565 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
microsoft windows_10_1909 < 10.0.18363.2094 cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*
microsoft windows_10_20h2 < 10.0.19042.1526 cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
microsoft windows_10_21h1 < 10.0.19043.1526 cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*
microsoft windows_10_21h2 < 10.0.19044.1526 cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
microsoft windows_11_21h2 < 10.0.22000.493 cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
microsoft windows_server_2019 < 10.0.17763.2565 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoft windows_server_2022 < 10.0.20348.524 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
microsoft windows_server_20h2 < 10.0.19042.1526 cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*

References for CVE-2022-21971

cvelogic Threat Intelligence