diff --git a/external/miniupnpc/igd_desc_parse.c b/external/miniupnpc/igd_desc_parse.c
index 0eaf21b6..a4396623 100644
--- a/external/miniupnpc/igd_desc_parse.c
+++ b/external/miniupnpc/igd_desc_parse.c
@@ -15,6 +15,10 @@
 void IGDstartelt(void * d, const char * name, int l)
 {
 	struct IGDdatas * datas = (struct IGDdatas *)d;
+        if (l >= MINIUPNPC_URL_MAXSIZE) {
+          printf("Attempt to exploit miniupnpc buffer overflow\n");
+          l = MINIUPNPC_URL_MAXSIZE - 1;
+        }
 	memcpy( datas->cureltname, name, l);
 	datas->cureltname[l] = '\0';
 	datas->level++;