Please take your time to read this PDF.
In this article…
Patch your SAP system NOW! - Critical flaw allows hackers to breach SAP systems with ease
SAP users should immediately deploy a newly released patch for a critical vulnerability that could allow hackers to compromise their systems and the data they contain.
The vulnerability, which has also been dubbed RECON (Remotely Exploitable Code on NetWeaver), has the highest possible severity rating (10) in the Common Vulnerability Scoring System (CVSS) because it can be exploited over HTTP without authentication and can lead to a full compromise of the system.