CVE-2020-0688 (GCVE-0-2020-0688)

Vulnerability from cvelistv5 – Published: 2020-02-11 21:22 – Updated: 2025-10-21 23:35
VLAI? CISA KEV
Summary
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'.
CWE
  • Remote Code Execution
Assigner
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2020-0688

Status: Confirmed

Status Updated: 2021-11-03 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03

Scope
Notes: KEV entry: Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability | Affected: Microsoft / Exchange Server | Description: Microsoft Exchange Server Validation Key fails to properly create unique keys at install time, allowing for remote code execution. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-0688

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-287
Feed CISA Known Exploited Vulnerabilities Catalog
Product Exchange Server
Due Date 2022-05-03
Date Added 2021-11-03
Vendorproject Microsoft
Vulnerabilityname Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability
Knownransomwarecampaignuse Known

References

Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website

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}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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