Rule Document 1:67153

Rule Category

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

Alert Message

SERVER-WEBAPP N-able N-central remote code execution attempt

Rule Explanation

This rule looks for multipart HTTP requests to the remoteControlAction.do endpoint that contain a Java BeanUtils property traversal assigning the Jetty CGI servlet class to a servlet holder. Successful exploitation allows an unauthenticated attacker to execute arbitrary commands on the target server.

What To Look For

This rule fires on attempts to exploit a pre-authentication remote code execution vulnerability in N-able N-central web applications.

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

Rule Categories::Server::Web Applications

MITRE::ATT&CK Framework::Enterprise::Initial Access::Exploit Public-Facing Application

Adversaries may attempt to take advantage of a weakness in an Internet-facing computer or program using software, data, or commands in order to cause unintended or unanticipated behavior. The weakness in the system can be a bug, a glitch, or a design vulnerability. These applications are often websites, but can include databases (like SQL), standard services (like SMB or SSH), network device administration and management protocols (like SNMP and Smart Install), and any other applications with Internet accessible open sockets, such as web servers and related services.

Vulnerability::Severity::Critical

Vulnerability::Severity::High

CVE

CVE-2026-86218

Additional Links

me.n-able.com/s/security-advisory/aArVy0000002Ld3KAE/cve202686218-preauthentication-remote-code-execution

Rule Vulnerability

N/A

Not Applicable

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.

CVE-2026-86218

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