CVE-2021-26855

Microsoft Exchange Server Remote Code Execution Vulnerability

CISA KEV FIRST EPSS Trusted public threat intelligence

Critical KEV Listed

Vendor

Microsoft

Product

Exchange Server

EPSS Score

1.0000

EPSS Percentile

1.000

Why this is prioritized

• This CVE is listed in the Known Exploited Vulnerabilities catalog.

• EPSS score: 1.0000

• EPSS percentile: 1.000

• Known ransomware campaign use: Known

• Added to KEV: 03 Nov 2021

• CISA remediation due date: 03 May 2022

Summary

This vulnerability is prioritized by TractionGRC using trusted public sources. KEV status reflects whether active exploitation has been observed, while EPSS reflects the estimated probability of exploitation in the next 30 days.

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