PULSE
LIVE45signals / 24h
ES
FEED
ransomincransom reclama a Kyokuto Kaihatsu Kogyo · JP · Manufacturingransomnova reclama a Phi · Not Foundransomnova reclama a Digipro · Technologyransomnova reclama a Integrated Marketing Services · Business Servicesransomkrybit reclama a eitzchaim.com · IL · Not Foundransomkrybit reclama a formasuniversales.com · MX · Business Servicesransomkrybit reclama a rehabmalaysia.com · MY · Healthcareransomkrybit reclama a www.lagus.cz · CZ · Business Servicesransomgunra reclama a Dissinger and Dissinger Law Firm · US · Business Servicesransomplay reclama a Boston Electric and Telephone · US · Telecommunicationransomplay reclama a Wring Group · GB · Not Foundransomincransom reclama a asa-international.com · GB · Business Servicesransomplay reclama a AG Scholtes · NL · Manufacturingransomplay reclama a Andorra Life · AD · Healthcareransomincransom reclama a Kyokuto Kaihatsu Kogyo · JP · Manufacturingransomnova reclama a Phi · Not Foundransomnova reclama a Digipro · Technologyransomnova reclama a Integrated Marketing Services · Business Servicesransomkrybit reclama a eitzchaim.com · IL · Not Foundransomkrybit reclama a formasuniversales.com · MX · Business Servicesransomkrybit reclama a rehabmalaysia.com · MY · Healthcareransomkrybit reclama a www.lagus.cz · CZ · Business Servicesransomgunra reclama a Dissinger and Dissinger Law Firm · US · Business Servicesransomplay reclama a Boston Electric and Telephone · US · Telecommunicationransomplay reclama a Wring Group · GB · Not Foundransomincransom reclama a asa-international.com · GB · Business Servicesransomplay reclama a AG Scholtes · NL · Manufacturingransomplay reclama a Andorra Life · AD · Healthcare
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CVE Watch—

CVE-2021-42321

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS

—

No CVSS

EPSS

90.4%

p100

KEV

YES

Nov 17, 2021

Exploit Today

80

0-100

Published: — · Last modified: —

EPSS · 30d
90.4%EPSS · 30 days90.4%
2026-06-302026-07-16
KEV catalog record

Product

Microsoft / Exchange

Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

Added to KEV

Nov 17, 2021

Remediate by

Dec 1, 2021

Known ransomware use

Yes

Summary description

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

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-42321

Related CVEs

No related CVEs by CWE or product.