CVE-2021-31201VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2021-31201: Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability

Affects Microsoft Enhanced Cryptographic ProviderSource 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: 2.6% chance of exploitation in 30 days – higher than 85% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-31201 (opens in a new tab)

Description

CVE-2021-31201 is a privilege escalation vulnerability in the Microsoft Enhanced Cryptographic Provider. It allows an attacker to gain elevated privileges on affected systems. The vulnerability has been exploited in the wild. No specific affected versions or detailed technical information are provided.

Summary

Microsoft Enhanced Cryptographic Provider contains an unspecified vulnerability identified as CVE-2021-31201 that enables privilege escalation. The exact nature of the flaw is not detailed in the available information. The vulnerability has been confirmed to be exploited in the wild, indicating active threat usage. No patch or remediation details are provided in the source data.

Impact

Successful exploitation of this vulnerability allows attackers to escalate privileges, potentially gaining higher-level access on compromised systems. This can lead to unauthorized actions and compromise of system integrity. The presence of active exploitation in the wild increases the risk to affected environments.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, monitor for updates from Microsoft and apply any recommended security measures from the vendor.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:19:40 UTC

References

Related threats