CVE-2021-31196

HIGH7.2

CISA KEV

Published 2021-07-14 · Updated 2026-08-10 · Source secure@microsoft.com

Summary

CVE-2021-31196 is a high-severity (CVSS 7.2) vulnerability in Microsoft Exchange Server. CISA added it to the Known Exploited Vulnerabilities catalog on August 21, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 11, 2024. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA Known-Exploited Vulnerability

Product: Microsoft — Exchange Server

Name: Microsoft Exchange Server Information Disclosure Vulnerability

Date added: 2024-08-21 · Due: 2024-09-11

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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