Is CVE-2021-27059 in the CISA KEV catalog?

Yes. CVE-2021-27059 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2021-27059?

CVE-2021-27059 has a CVSS v3 base score of 7.6 (HIGH).

What is the EPSS score for CVE-2021-27059?

CVE-2021-27059 has an EPSS score of 3.18% (86th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-27059

HIGHCISA KEVEPSS 86th pctl

7.6

CVSS v3

NVD

Description

Microsoft Office Remote Code Execution Vulnerability

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.18%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Office Remote Code Execution Vulnerability

Microsoft Office contains an unspecified vulnerability that allows for remote code execution.

Apply updates per vendor instructions.

Remediation due: 2021-11-17

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.