diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 2162b9c7..0a847d07 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -2218,6 +2218,10 @@ class SSH2
                 }
             }
 
+            if (!count($newargs)) {
+                return false;
+            }
+
             foreach ($newargs as $arg) {
                 if ($this->login_helper($username, $arg)) {
                     return true;