# CVE-2021-34473

> Microsoft Exchange Server Remote Code Execution Vulnerability

- **CVSS:** 9.1 (CRITICAL)
- **EPSS:** 94.2%
- **CISA KEV:** yes (known ransomware use)
- **CWE:** CWE-918

Canonical: https://intel.threadlinqs.com/cve/CVE-2021-34473
Full threat coverage + IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp