Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
                
                    Exploit prediction scoring system (EPSS) score
                    
                        
                            EPSS Score 0.216
                        
                    
                    
                        
                            EPSS Ranking 95.5%