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ExploitedIn CISA KEVFix available

CVE-2020-0688

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2020-02-11
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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'.

Timeline

dates in UTC
  1. 2020-02-1122:15CVE publishedNVD
  2. 2020-03-02Exploit-DB entryExploit-DB
  3. 2021-11-03Added to the CISA KEV catalogCISA KEV
  4. 2021-11-03Listed as exploited by GCVEGCVE
  5. 2021-11-03Exploitation first reportedCISA KEV
  6. 2025-02-0418:44SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-0688?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-0688?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft Exchange Server
BranchAffectedFixed in
2010.x= 2010no fix published
2013.x= 2013no fix published
2016.x= 2016no fix published
2019.x= 2019no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA6 products

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Microsoft Exchange Server 2013
    Affected
    • = Cumulative Update 23no fix stated
  • Microsoft Exchange Server 2019 Cumulative Update 3
  • Microsoft Exchange Server 2016 Cumulative Update 14
  • Microsoft Exchange Server 2016 Cumulative Update 15
  • Microsoft Exchange Server 2019 Cumulative Update 4
  • Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2020-03-04

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-48153EDB-48168
Exploit-DB
Proof-of-concept repositories
20 repositories, unverifiedrandom-robbie/cve-2020-0688Jumbo-WJB/CVE-2020-0688Ridter/cve-2020-0688Yt1g3r/CVE-2020-0688_EXPtruongtn/cve-2020-0688
PoC-in-GitHub
Metasploit modules
1 moduleexploit/windows/http/exchange_ecp_viewstaterank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Known
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2020-02-11
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-4g56-8mc7-hpjq

Frequently asked questions

What is 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'.

Is CVE-2020-0688 actively exploited?

Yes. CVE-2020-0688 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2020-0688?

CVE-2020-0688 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record