CVE-2021-34523
KEV · ransomware Critical · CVSS 9.0- CVSS
- 9.0
- nvd
- EPSS
- —
- KEV
- Listed
- ransomware
- Class
- other
- NVD-CWE-noinfo
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34523
- http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523
- https://www.zerodayinitiative.com/advisories/ZDI-21-822/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34523
Status: profiled · ingested 2026-08-10T18:00:50.000Z