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Microsoft ExchangeMicrosoft Exchange Server Remote Code Execution Vulnerability

Risk 93
Severity
8.8
Exploited
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.

1 / 2
Source: CISA
First published (updated )
CVE-2021-42321

Microsoft Exchange ServerMicrosoft Exchange Server Cross-Site Scripting Vulnerability

Risk 72
Severity
8.1
Exploited
XSS
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

1 / 3
Source: Microsoft
First published (updated )
CVE-2026-42897

Microsoft Exchange ServerMicrosoft Exchange Server Information Disclosure Vulnerability

Risk 80
Severity
7.2
Exploited
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Microsoft Exchange Server contains an information disclosure vulnerability that allows for remote code execution.

1 / 3
Source: CISA

Remedy

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
First published (updated )
CVE-2021-31196

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