Vulnerabilities CVE-2021-33766

CVE-2021-33766

High

Open

KEV

TLP:CLEAR

Microsoft Exchange Server Information Disclosure Vulnerability

NVD CVE.org

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Description

Microsoft — Exchange Server — Microsoft Exchange Server contains an information disclosure vulnerability which can allow an unauthenticated attacker to steal email traffic from target.

Details

CVSS Score: 7.3
EPSS Score ⓘ: 98.18%

99.9th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
Confidence: 100%
Published: Jul 14, 2021
Last Modified: Aug 10, 2026
CISA KEV
Date Added: Jan 18, 2022
Patch Due: Feb 1, 2022
Required Action: Apply updates per vendor instructions.

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