9.3

CVE-2022-21971: Microsoft Windows Runtime Remote Code Execution Vulnerability

CVSS: 9.3v2.0HighKEVAnalyzed
Published 09-02-2022Last modified 21-10-2025
Open JSON

Vulnerability summary

CVE-2022-21971 is a high (CVSS 9.3) Access of Uninitialized Pointer vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 18-08-2022. EPSS estimates a 53.93% chance of exploitation in the next 30 days, higher than 98.9% of scored vulnerabilities.

Overall risk
85/100
0100
Critical · default modelHow is this calculated?
CVSS score
9.3/10
010
High · v2.0 (NVD)
EPSS score
53.93%
0%100%
Critical · 0.00 pp in 30 days
KEVListedCISA
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-02-2022
    PublishedVulnerability first disclosed.
  2. 18-08-2022
    Added to CISA KEVMicrosoft Windows Runtime Remote Code Execution Vulnerability
  3. 08-09-2022
    CISA remediation dueApply updates per vendor instructions.
  4. 21-10-2025
    Last modifiedVulnerability information updated.

Description

Windows Runtime Remote Code Execution Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

53.93%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

0.00 pp

From 53.93% on 19-09-2026

19-09-202619-10-2026
EPSS score
53.93%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
18-08-2022
Federal due date
08-09-2022

CISA required action

Apply updates per vendor instructions. msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971 nvd.nist.gov/vuln/detail/CVE-2022-21971

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft17 products

1 vendor · 17 products

References

2 links