CVE-2021-27059VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2021-27059: Microsoft Office Remote Code Execution Vulnerability

Affects Microsoft OfficeSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 11/17/2021
EPSS: 6.1% chance of exploitation in 30 days – higher than 93% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-27059 (opens in a new tab)

Description

CVE-2021-27059 is a high-severity remote code execution vulnerability in Microsoft Office. The vulnerability allows an attacker to execute arbitrary code remotely. It has been exploited in the wild. No specific affected versions or patch information are provided in the available data.

Summary

Microsoft Office contains an unspecified vulnerability identified as CVE-2021-27059 that enables remote code execution. Details on the exact nature of the vulnerability, affected versions, and remediation are not provided in the input data. The vulnerability has been observed to be exploited in the wild, indicating active threat usage.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected Microsoft Office installations, potentially leading to full system compromise. The presence of known exploitation in the wild increases the risk to users of vulnerable versions.

Mitigation

Patch status is not yet confirmed — check the official Microsoft advisory for current remediation guidance. Until a patch or official fix is confirmed, users should follow Microsoft’s security recommendations and consider applying any available updates promptly.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:30 UTC

References

Related threats