diff --git a/html/cgi-bin/index.cgi b/html/cgi-bin/index.cgi
index 2b7ccdb0f..fbd656988 100644
--- a/html/cgi-bin/index.cgi
+++ b/html/cgi-bin/index.cgi
@@ -2,7 +2,7 @@
 ###############################################################################
 #                                                                             #
 # IPFire.org - A linux based firewall                                         #
-# Copyright (C) 2007-2014  IPFire Team  <info@ipfire.org>                     #
+# Copyright (C) 2007-2022  IPFire Team  <info@ipfire.org>                     #
 #                                                                             #
 # This program is free software: you can redistribute it and/or modify        #
 # it under the terms of the GNU General Public License as published by        #
@@ -541,6 +541,14 @@ if ( ! -e "/var/ipfire/main/send_profile") {
 	$warnmessage .= "<li><a style='color: white;' href='fireinfo.cgi'>$Lang::tr{'fireinfo please enable'}</a></li>";
 }
 
+# Running on likely outdated Core Update (last update was more than 90 days ago)
+my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size, $atime, $mtime, $ctime, $blksize, $blocks) = stat "/opt/pakfire/db/core/mine";
+my $core_update_age = time() - $mtime;
+
+if ( "$core_update_age" > "7776000" ) {
+	$warnmessage .= "<li>$Lang::tr{'outdated installation warning'}</li>";
+}
+
 # EOL architecture
 my ($sysname, $nodename, $release, $version, $machine) = &POSIX::uname();
 if ($machine =~ m/^i.86$/) {
diff --git a/langs/de/cgi-bin/de.pl b/langs/de/cgi-bin/de.pl
index c81b28fea..2ae0f948c 100644
--- a/langs/de/cgi-bin/de.pl
+++ b/langs/de/cgi-bin/de.pl
@@ -1878,6 +1878,7 @@
 'otherport' => 'Anderer Port',
 'our donors' => 'Unsere Unterstützer',
 'out' => 'Aus',
+'outdated installation warning' => 'Diese IPFire-Installation ist veraltet, was ein Sicherheitsrisiko darstellt. Bitte aktualisieren Sie das System schnellstmöglich.',
 'outgoing' => 'ausgehend',
 'outgoing compression in bytes per second' => 'Abgehende Kompression',
 'outgoing firewall' => 'Ausgehende Firewall',
diff --git a/langs/en/cgi-bin/en.pl b/langs/en/cgi-bin/en.pl
index 2f7038fb1..8d1eb3e2d 100644
--- a/langs/en/cgi-bin/en.pl
+++ b/langs/en/cgi-bin/en.pl
@@ -1914,6 +1914,7 @@
 'otherport' => 'other Port',
 'our donors' => 'Our donors',
 'out' => 'Out',
+'outdated installation warning' => 'This IPFire installation is outdated, which is a security risk. Please check for and install updates as soon as possible.',
 'outgoing' => 'outgoing',
 'outgoing compression in bytes per second' => 'Outgoing compression',
 'outgoing firewall' => 'Outgoing Firewall',