CVE-2020-0688
A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory,…
- Published
- Updated
- Reserved
- Assigned by
- microsoft
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'.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability.
- Added
- 3 Nov 2021
- Fix due (US federal)
- 3 May 2022
- Used by ransomware
- Known
Apply updates per vendor instructions.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
- Remote Code Execution
- CWE-287 Improper Authentication (opens in a new tab)All about CWE-287 and its CVEs
Affected products
Microsoft · Microsoft Exchange Server 2013
- affected Cumulative Update 23
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 3
- affected unspecified
Microsoft · Microsoft Exchange Server 2016 Cumulative Update 14
- affected unspecified
Microsoft · Microsoft Exchange Server 2016 Cumulative Update 15
- affected unspecified
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 4
- affected unspecified
Microsoft · Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30
- affected unspecified
References (5)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.zerodayinitiative.com/advisories/ZDI-20-258/ (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/156592/Microsoft-Exchange-2019-15.2.221.12-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/156620/Exchange-Control-Panel-Viewstate-Deserialization.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0688 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-0688)Record last updated .