Description
Microsoft Exchange Server Security Feature Bypass Vulnerability
Metrics
CVSS 3.1 6.6/10
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | >= 15.00.0, < 15.00.1497.018 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 9 | >= 15.02.0, < 15.02.0858.012 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 20 | >= 15.01.0, < 15.01.2242.010 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 19 | >= 15.01.0, < 15.01.2176.014 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 8 | >= 15.02.0, < 15.02.0792.015 |
References
- http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31207Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-819/Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31207Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-819/Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31207US Government Resource
Timeline
- Published
- May 11, 2021
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Nov 3, 2021
- NVD status
- Analyzed