CVE-2021-31207

Microsoft Exchange Server Security Feature Bypass Vulnerability

Published May 11, 2021 CVSS 3.1 · 6.6 Medium EPSS 99.8% KEV · Listed
Description
Microsoft Exchange Server Security Feature Bypass Vulnerability

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics epss

{'score': 0.94028}

epss

{'score': 0.94004}

Type Values Removed Values Added
Metrics epss

{'score': 0.93866}

epss

{'score': 0.94028}

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2021-11-03'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Oct 21, 2025, 11:25 PM
Reserved
Apr 14, 2021, 12:00 AM
Status
Analyzed
Published
May 11, 2021, 7:15 PM
Modified
Jun 17, 2026, 3:51 AM