CVE-2021-33766

high

Description

Microsoft Exchange Server Information Disclosure Vulnerability

References

https://www.zerodayinitiative.com/advisories/ZDI-21-798/

https://www.tenable.com/blog/aa22-257a-cybersecurity-joint-advisory-on-iranian-islamic-revolutionary-guard-ransomware

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33766

Details

Source: Mitre, NVD

Published: 2021-07-14

Updated: 2025-03-07

Named Vulnerability: ProxyTokenKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

EPSS

EPSS: 0.91528