Microsoft Exchange ECP Probe (ProxyShell / ProxyLogon) for 2026-07-03

Last Updated: 12:00 UTC

The Exchange Control Panel (/ecp/) is the attack surface for ProxyLogon (CVE-2021-26855) and ProxyShell (CVE-2021-34473/34523/31207). Both exploit chains begin with ECP requests and achieve unauthenticated RCE leading to ASPX webshell deployment on the Exchange server.

CVE References

CVE-2021-26855 CVE-2021-34473

MITRE ATT&CK

Tactic: Initial Access (TA0001)
Technique: T1190 — Exploit Public-Facing Application

Observed URIs

Attackers by Country

IP Address : ASN : City/Provider

• 165.22.34.189 : AS14061 digitalocean llc : Clifton

• 20.168.0.218 : AS8075 microsoft corporation : United States of America