CVE-2018-2391

CVE-2018-2391 is a denial-of-service vulnerability affecting SAP Internet Graphics Server (IGS) versions 7.20, 7.20EXT, 7.45, 7.49, and 7.53. A malicious authenticated user can exploit the IGS portwatcher service to prevent legitimate users from accessing the server. This vulnerability has a CVSS v3 score of 6.5 (Medium), indicating a network-based attack with low complexity, requiring low privileges, and resulting in high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it did receive one media mention.