CVE-2021-27065
Microsoft Exchange Server Remote Code Execution Vulnerability
- Published
- Mar 2, 2021
- Updated
- Oct 1, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Mar 11, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Oct 19, 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
Microsoft Exchange Server Remote Code Execution Vulnerability
Sources
modules/exploits/windows/http/exchange_proxylogon_rce.rb
Metasploit Framework modulesDeclared conditions
- platform: Windows($.exploit_windows/http/exchange_proxylogon_rce.platform)
- verification: check_declared($.exploit_windows/http/exchange_proxylogon_rce.check)
- ExchangeSSRFtoRCEExploitExploit
Exploit chain for CVE-2021-26855 (SSRF) and CVE-2021-27065 (RCE) targeting Microsoft Exchange servers, enabling remote code execution via ProxyLogon vulnerability.
- ProxyVulnsExploit
Responsible use
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