CVE-2020-0688

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 1.000 · 100 %ileexploit · weaponizedEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 28 exploits · weaponized

Likely / severe?

100.0% (100th) EPSS

CVSS 9 · high

Is it mine?

15 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2021-11-03remediate by 2022-05-03

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability

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'.

cvss

Technical severity, 0–10. One row per scoring source.

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-502US

ATT&CK techniques

ATT&CK techniques this enables or maps to.

exploits (28)

Public proof-of-concept and weaponised exploit code.

exploit/windows/http/exchange_ecp_viewstateExchange Control Panel ViewState Deserializationweaponized · metasploit
EDB-48168Exchange Control Panel - Viewstate Deserialization (Metasploit)functional · exploit_db
EDB-48153Microsoft Exchange 2019 15.2.221.12 - Authenticated Remote Code ExecutionPoC · exploit_db
1337-llama/CVE-2020-0688-Python3Exploit updated to use Python 3.PoC · poc_in_github
7heKnight/CVE-2020-0688CVE-2020-0688_Microsoft Exchange default MachineKeySection deserialize vulnerabilityPoC · poc_in_github
Jumbo-WJB/CVE-2020-0688CVE-2020-0688 - ExchangePoC · poc_in_github

affected products (15)

Products and version ranges known to be affected.

Microsoft Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Exchange Server 2013≤ Cumulative Update 23enisa_euvdEU
Microsoft Microsoft Exchange Server 2016 Cumulative Update 14≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Exchange Server 2016 Cumulative Update 15≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Exchange Server 2019 Cumulative Update 3≤ unspecifiedenisa_euvdEU
Microsoft Microsoft Exchange Server 2019 Cumulative Update 4≤ unspecifiedenisa_euvdEU
Microsoft Corp Microsoft Exchange Server≤ 2019 Cumulative Update 14fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2010 Service Pac 3 Update Rollup30fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2019 Cumulative Update 3fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2016 Cumulative Update 14fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2013 Cumulative Update 23fstec_bduRU
microsoft exchange server= 2010nvdUScpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:*
microsoft exchange server= 2013nvdUScpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:*
microsoft exchange server= 2016nvdUScpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:*
microsoft exchange server= 2019nvdUScpe:2.3:a:microsoft:exchange_server:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-02-11modified 2026-06-17

related (7,714)

Related entries.

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+7709 more

references (20)

External citations — patches, advisories, analysis.

scry

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