CVE-2021-34453

HIGH

Microsoft Exchange Server - Denial of Service

Title source: llm
STIX 2.1

Description

Microsoft Exchange Server Denial of Service Vulnerability

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0267
EPSS Percentile 84.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

Status published
Products (2)
microsoft/exchange_server 2016 cumulative_update_21 (2 CPE variants)
microsoft/exchange_server 2019 cumulative_update_10 (2 CPE variants)
Published Oct 13, 2021
Tracked Since Feb 18, 2026