CVE-2020-0688
Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability
- Published
- Feb 11, 2020
- Updated
- Oct 21, 2025
- Assigning CNA
- microsoft
- Evidence observed
- Mar 2, 2020
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
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'.
Sources
25- CVE-2020-0688Exploit
CVE-2020-0688_Microsoft Exchange default MachineKeySection deserialize vulnerability
- CVE-2020-0688Scanner
Scans networks for Microsoft Exchange servers vulnerable to CVE-2020-0688, using zmap for host discovery and TLS/version fingerprinting to identify unpatched instances.
- CVE-2020-0688Exploit
CVE-2020-0688 - Exchange
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.