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Exploits
ID:7244 - Exploit for Server-Side Request Forgery (SSRF) in Microsoft Exchange Server - CVE-2021-26855
ID:7244 - Exploit for Server-Side Request Forgery (SSRF) in Microsoft Exchange Server - CVE-2021-26855
Published: January 16, 2022
Vulnerability identifier: #VU51171
Vulnerability risk: Critical
CVE-ID: CVE-2021-26855
CWE-ID: CWE-918
Exploitation vector: Remote access
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted HTTP request to the Microsoft Exchange OWA interface, upload arbitrary file on the server and execute it.
Note, this vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.