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CVE-2020-17144

Microsoft Exchange Server Remote Code Execution

8.4 HIGHActively exploited (CISA KEV)EPSS 36.5%
  1. Published9 Dec 2020
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Microsoft Exchange Server improperly validates cmdlet arguments which allow an attacker to perform remote code execution.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

Description

Microsoft Exchange Remote Code Execution Vulnerability

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

Microsoft Exchange Server2010

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2020-17144 being actively exploited?

Yes. CVE-2020-17144 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-17144?

CVE-2020-17144 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 36.5% probability of exploitation.

Which products are affected by CVE-2020-17144?

Affected products include Microsoft Exchange Server.

How do I fix CVE-2020-17144?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-17144 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.