diff --git a/miniupnpc/connecthostport.c b/miniupnpc/connecthostport.c
index 6d58e6d..a59dc82 100644
--- a/miniupnpc/connecthostport.c
+++ b/miniupnpc/connecthostport.c
@@ -1,4 +1,4 @@
-/* $Id: connecthostport.c,v 1.15 2015/10/09 16:26:19 nanard Exp $ */
+/* $Id: connecthostport.c,v 1.21 2019/04/23 12:11:08 nanard Exp $ */
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * Project : miniupnp
  * Author : Thomas Bernard
@@ -170,7 +170,7 @@ SOCKET connecthostport(const char * host, unsigned short port,
 		for(i = 0, j = 1; host[j] && (host[j] != ']') && i < MAXHOSTNAMELEN; i++, j++)
 		{
 			tmp_host[i] = host[j];
-			if(0 == memcmp(host+j, "%25", 3))	/* %25 is just url encoding for '%' */
+			if(0 == strncmp(host+j, "%25", 3))	/* %25 is just url encoding for '%' */
 				j+=2;							/* skip "25" */
 		}
 		tmp_host[i] = '\0';
diff --git a/miniupnpc/minissdpc.c b/miniupnpc/minissdpc.c
index 815108f..385b72e 100644
--- a/miniupnpc/minissdpc.c
+++ b/miniupnpc/minissdpc.c
@@ -1,4 +1,4 @@
-/* $Id: minissdpc.c,v 1.39 2019/04/10 12:09:17 nanard Exp $ */
+/* $Id: minissdpc.c,v 1.40 2019/04/23 12:12:55 nanard Exp $ */
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * Project : miniupnp
  * Web : http://miniupnp.free.fr/
@@ -877,11 +877,11 @@ ssdpDiscoverDevices(const char * const deviceTypes[],
 					       stsize, st, usnsize, (usn?usn:""), urlsize, descURL);
 #endif /* DEBUG */
 					for(tmp=devlist; tmp; tmp = tmp->pNext) {
-						if(memcmp(tmp->descURL, descURL, urlsize) == 0 &&
+						if(strncmp(tmp->descURL, descURL, urlsize) == 0 &&
 						   tmp->descURL[urlsize] == '\0' &&
-						   memcmp(tmp->st, st, stsize) == 0 &&
+						   strncmp(tmp->st, st, stsize) == 0 &&
 						   tmp->st[stsize] == '\0' &&
-						   (usnsize == 0 || memcmp(tmp->usn, usn, usnsize) == 0) &&
+						   (usnsize == 0 || strncmp(tmp->usn, usn, usnsize) == 0) &&
 						   tmp->usn[usnsize] == '\0')
 							break;
 					}
diff --git a/miniupnpc/miniupnpc.c b/miniupnpc/miniupnpc.c
index 5e2653e..b865388 100644
--- a/miniupnpc/miniupnpc.c
+++ b/miniupnpc/miniupnpc.c
@@ -1,9 +1,9 @@
-/* $Id: miniupnpc.c,v 1.149 2016/02/09 09:50:46 nanard Exp $ */
+/* $Id: miniupnpc.c,v 1.154 2019/04/23 12:12:13 nanard Exp $ */
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * Project : miniupnp
  * Web : http://miniupnp.free.fr/
  * Author : Thomas BERNARD
- * copyright (c) 2005-2018 Thomas Bernard
+ * copyright (c) 2005-2019 Thomas Bernard
  * This software is subjet to the conditions detailed in the
  * provided LICENSE file. */
 #include <stdlib.h>
@@ -63,7 +63,7 @@
 #include "connecthostport.h"
 
 /* compare the beginning of a string with a constant string */
-#define COMPARE(str, cstr) (0==memcmp(str, cstr, sizeof(cstr) - 1))
+#define COMPARE(str, cstr) (0==strncmp(str, cstr, sizeof(cstr) - 1))
 
 #ifndef MAXHOSTNAMELEN
 #define MAXHOSTNAMELEN 64
@@ -459,7 +459,7 @@ build_absolute_url(const char * baseurl, const char * descURL,
 	memcpy(s, base, n);
 	if(scope_id != 0) {
 		s[n] = '\0';
-		if(0 == memcmp(s, "http://[fe80:", 13)) {
+		if(n > 13 && 0 == memcmp(s, "http://[fe80:", 13)) {
 			/* this is a linklocal IPv6 address */
 			p = strchr(s, ']');
 			if(p) {