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Vulnerability of Microsoft Exchange Server: vulnerabilities of April 2021

Synthesis of the vulnerability 

An attacker can use several vulnerabilities of Microsoft products.
Impacted software: Exchange.
Severity of this computer vulnerability: 4/4.
Number of vulnerabilities in this bulletin: 4.
Creation date: 13/04/2021.
Références of this announce: CERTFR-2021-AVI-262, CVE-2021-28480, CVE-2021-28481, CVE-2021-28482, CVE-2021-28483, VIGILANCE-VUL-35068.

Description of the vulnerability 

An attacker can use several vulnerabilities of Microsoft products. The document...
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This vulnerability alert impacts software or systems such as Exchange.

Our Vigil@nce team determined that the severity of this computer weakness alert is critical.

The trust level is of type confirmed by the editor, with an origin of internet client.

This bulletin is about 4 vulnerabilities.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer vulnerability.

Solutions for this threat 

Workarounds for this vulnerability are not yet public.
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Computer vulnerabilities tracking service 

Vigil@nce provides network vulnerability announces. The Vigil@nce team tracks computer vulnerabilities impacting systems and applications.