Rule Category

SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.

Alert Message

SERVER-WEBAPP Microsoft SharePoint potential deserialization attempt

Rule Explanation

This rule is designed to look for the crafted URI and parameters as part of the exploitation process.

What To Look For

This rule alerts on potential attempts to exploit CVE-2021-27076 against SharePoint servers.

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Initial Access

Technique: Exploit Public-Facing Application

For reference, see the MITRE ATT&CK vulnerability types here:

Additional Links

Rule Vulnerability


Not Applicable

CVE Additional Information