Is CVE-2021-34486 in the CISA KEV catalog?

Yes. CVE-2021-34486 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-28.

What is the CVSS severity of CVE-2021-34486?

CVE-2021-34486 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-34486?

CVE-2021-34486 has an EPSS score of 7.43% (94th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-34486

HIGHCISA KEVEPSS 94th pctl

7.8

CVSS v3

NVD

Description

Windows Event Tracing Elevation of Privilege Vulnerability

CWE-416Use After Free

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

7.43%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Windows Event Tracing Privilege Escalation Vulnerability

Microsoft Windows Event Tracing contains an unspecified vulnerability which can allow for privilege escalation.

Apply updates per vendor instructions.

Remediation due: 2022-04-18

References

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.