Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-0688

CVE-2020-0688HIGH

Microsoft Exchange Server

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS    %ile   KEV
   N   L   L   N  U  H  H  H    8.8   .9996   100.0   YES

AFFECTED
  Product                                                         Versions                Fixed
  Microsoft Exchange Server 2013                                  Cumulative Update 23 –  —
  Microsoft Exchange Server 2019 Cumulative Update 3              unspecified –           —
  Microsoft Exchange Server 2016 Cumulative Update 14             unspecified –           —
  Microsoft Exchange Server 2016 Cumulative Update 15             unspecified –           —
  Microsoft Exchange Server 2019 Cumulative Update 4              unspecified –           —
  Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30  unspecified –           —

TIMELINE
  Nov 4   Reserved by microsoft
  Feb 11  Published (CNA: microsoft)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-287 · CNA: microsoft · CVSS v3.1 · 5 references · KEV due May 3, 2022

Description

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'.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 4, 2019	Reserved	Reserved by microsoft
February 11, 2020	Published	Published (CNA: microsoft)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 6 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Microsoft Exchange Server 2013	—	Cumulative Update 23	—
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 3	—	unspecified	—
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 14	—	unspecified	—
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 15	—	unspecified	—
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 4	—	unspecified	—
Microsoft	Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30	—	unspecified	—

Weaknesses

CWE-287

References (5)

http://packetstormsecurity.com/files/156592/Microsoft-Exchange-2019-15.2.221.12-Remote-Code-Execution.html [x_refsource_MISC]
http://packetstormsecurity.com/files/156620/Exchange-Control-Panel-Viewstate-Deserialization.html [x_refsource_MISC]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0688 [government-resource]
https://www.zerodayinitiative.com/advisories/ZDI-20-258/ [x_refsource_MISC]

Authoritative record: CVE-2020-0688 at cve.org

Vendors: microsoft

Weaknesses: CWE-287

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-0688 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.