Cisco Snort Remote Code Execution Vulnerability (CVE-2026-20218)

CVE number – CVE-2026-20218

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco Snort.

Authentication is not required to exploit this vulnerability.

The specific flaw exists within the decompression of VBA data in OLE file streams.

The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer.

An attacker can leverage this vulnerability to execute code in the context of the service account.

Cisco has issued an update to correct this vulnerability.

I am one of the editors here at www.systemtek.co.uk I am a UK based technology professional, with an interest in computer security and telecoms.