Is CVE-2021-27091 in the CISA KEV catalog?

No. CVE-2021-27091 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27091?

CVE-2021-27091 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-27091?

CVE-2021-27091 has an EPSS score of 0.56% (42th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27091?

Install KB5001392 for Windows 7. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-27091

HIGH

7.8

CVSS v3

NVD

Description

RPC Endpoint Mapper Service Elevation of Privilege Vulnerability

How to fix

Remediation Available

Windows 7Windows

Install:KB5001392Microsoft

Install:KB5001335Microsoft

Windows Server 2008 R2Windows

Install:KB5001392Microsoft

Install:KB5001335Microsoft

Windows Server 2012Windows

Install:KB5001387Microsoft

Install:KB5001383Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5001387Microsoft

Install:KB5001383Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

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

0.56%probability of exploitation in 30 days

42ndpercentile

Moderate risk: more likely to be exploited than 42% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

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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 2024-11-21.