CVE report

CVE-2021-34473criticalKEV

Exchange Server - Remote Code Execution

Events 7d

13

Distinct IPs

11

Severity

critical

CISA KEV

Actively exploited

Daily probe volume (last 7 days)

peak: 7
2026-05-15: 7 events05-152026-05-17: 3 events05-172026-05-19: 3 events05-19

Downloads & integrations

Top sources probing for CVE-2021-34473

URL patterns we match

An event counts toward CVE-2021-34473 if its URL path contains any of these substrings (case-insensitive).

  • ยท /autodiscover/autodiscover.json