Microsoft Exchange ECP Probe (ProxyShell / ProxyLogon) for 2026-10-22

Last Updated: 00:00 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

Germany: 25United States: 15United Kingdom: 9The Netherlands: 9Canada: 9Singapore: 6India: 3
Germany2532.9%
United States1519.7%
United Kingdom911.8%
The Netherlands911.8%
Canada911.8%
Singapore67.9%
India33.9%

IP Address : ASN : City/Provider

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