Microsoft Exchange ECP Probe (ProxyShell / ProxyLogon) for 2026-04-16
Apr 16, 2026
WebExploit
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
MITRE ATT&CK
Tactic: Initial Access (TA0001)
Technique: T1190 — Exploit Public-Facing Application
Observed URIs
Attackers by Country
| United States of America | 3 | 50.0% |
| Germany | 1 | 16.7% |
| United Kingdom of Great Britain and Northern Ireland | 1 | 16.7% |
| Netherlands | 1 | 16.7% |
IP Address : ASN : City/Provider
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135.237.127.54 : AS10455 nokia of america corporation : United States of America
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139.59.132.8 : AS14061 digitalocean llc : Frankfurt am Main
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142.93.0.66 : AS14061 digitalocean llc : North Bergen
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167.172.232.142 : AS14061 digitalocean llc : Clifton
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209.97.180.8 : AS14061 digitalocean llc : London
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68.183.9.16 : AS14061 digitalocean llc : Amsterdam