CVE-2020-17144

HIGH severity · CVSS 8.4 · Insecure deserialization · actively exploited (CISA KEV)

8.4CVSS HIGH ● exploited

🔴 Actively exploited in the wild (CISA Known Exploited Vulnerabilities). Added to KEV 2021-11-03. US federal agencies must patch by 2022-05-03.

Summary

Microsoft Exchange Remote Code Execution Vulnerability

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredHigh

User interactionRequired

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)92%

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products we track (1)

Microsoft Exchange Server

Recommendation

This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.

Official patch: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17144 ↗

Additional information

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