CVE-2022-21855

—

CVSS 3.1

9.0 critical

EPSS

<1%p58

Published

Jan 11, 2022 (Jan 11, 2022)

Modified

Jun 17, 2026

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Vendors: microsoft
Products: exchange server
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.9%)

In the news2 stories

First Patch Tuesday of 2022 Brings Fix for a Critical 'Wormable' Windows Vulnerability

The Hacker NewsJan 15, 00:00 UTC · Jan 15, 2022Vulnerability CVE-2022-21907 CVE-2021-22947 CVE-2021-36976+10 CVEs

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Microsoft Patch Tuesday for Jan. 2022 — Snort rules and prominent vulnerabilities

Cisco TalosJan 11, 22:12 UTC · Jan 11, 2022Vulnerability in the wildCVE-2022-21840 CVE-2022-21841 CVE-2022-21837+7 CVEs

60