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Servers and applications

CVE-2020-0688

A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Memory Corruption Vulnerability'.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
High 8.8
Published
11 Feb 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 2010-sp3_rollup_30
  • Version 2013-cumulative_update_23
  • Version 2016-cumulative_update_14
  • Version 2016-cumulative_update_15
  • Version 2019-cumulative_update_3
  • Version 2019-cumulative_update_4

Known exploited

CISA name
Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-0688
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-0688