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Home MicrosoftCVE-2021-31207

Medium

6.6CVSS

CVE-2021-31207

Vendor:Microsoft

Published: 11 May 2021

Updated 5mo ago

Generated remediation guidance and an executive summary. No account required.

Description

Microsoft Exchange Server Security Feature Bypass Vulnerability

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-434 · Unrestricted File Upload CWE-434 · Unrestricted File Upload

Metadata

Primary Vendor: MICROSOFT
Published: 5/11/2021
Last Modified: 10/30/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : exchange_servermicrosoft : exchange_servermicrosoft : exchange_servermicrosoft : exchange_servermicrosoft : exchange_server

Remediation Guidance

Executive Summary

View on NIST NVD

CVE-2021-31207 - remediation guidance & executive summary | CVEDatabase.com

Related reading

Use CWE-434, Microsoft vendor hub and Exchange Server product page to widen CVE-2021-31207 into its surrounding weakness, vendor, and product context.

Compare it with CVE-2025-59249, CVE-2025-53782 and CVE-2025-53786 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.