What’s Vulnerable › Vulnerabilities

CVE-2020-17144: Microsoft Exchange Remote Code Execution Vulnerability

• Severity: medium (CVSS 6.0 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 36.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-09 · updated 2026-06-17
• Weakness: CWE-502

Description

Microsoft Exchange Remote Code Execution Vulnerability

Affected products

• Microsoft Exchange Server: 2010-sp3_rollup_31
• Microsoft Exchange Server: before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Exchange Server publication. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17144
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17144
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17144

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