WinVNC 3.3.3 and earlier generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.
                
                    Exploit prediction scoring system (EPSS) score
                    
                        
                            EPSS Score 0.014
                        
                    
                    
                        
                            EPSS Ranking 79.8%