diff --git a/README.txt b/README.txt
index 5e495fb..cabf2c1 100644
--- a/README.txt
+++ b/README.txt
@@ -301,6 +301,16 @@ WARNING:
 Zlib compression at the php.ini level and Memcache conflict.
 See http://drupal.org/node/273824
 
+## SECURITY ##
+
+Depending on how memcache is installed, it's possible that it allows external
+connections by default. In that case, anyone on the internet can modify your data.
+To test if this is the case, run the following from an external system:
+
+  echo "stats" | nc YOURSITE.com 11211
+
+For more info, see https://drupal.org/node/2038405
+
 ## MEMCACHE ADMIN ##
 
 A module offering a UI for memcache is included. It provides aggregated and