Is CVE-2021-41379 in the CISA KEV catalog?

Yes. CVE-2021-41379 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-03, and has known ransomware campaign use.

What is the CVSS severity of CVE-2021-41379?

CVE-2021-41379 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-41379?

CVE-2021-41379 has an EPSS score of 20.26% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-41379

MEDIUMCISA KEVEPSS 97th pctl

5.5

CVSS v3

NVD

Description

Windows Installer Elevation of Privilege Vulnerability

CWE-59

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

20.26%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Windows Installer Privilege Escalation Vulnerability

Microsoft Windows Installer contains an unspecified vulnerability that allows for privilege escalation.

Apply updates per vendor instructions.

Remediation due: 2022-03-17

Associated with ransomware campaigns

References

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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.