diff --git a/centreon-plugins/storage/qnap/snmp/mode/upgrade.pm b/centreon-plugins/storage/qnap/snmp/mode/upgrade.pm
new file mode 100644
index 000000000..882c1470f
--- /dev/null
+++ b/centreon-plugins/storage/qnap/snmp/mode/upgrade.pm
@@ -0,0 +1,111 @@
+#
+# Copyright 2021 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package storage::qnap::snmp::mode::upgrade;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold_ng);
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'global', type => 0 }
+    ];
+
+    $self->{maps_counters}->{global} = [
+        { label => 'status', type => 2, warning_default => '%{upgrade} != 0', set => {
+                key_values => [
+                    { name => 'model' }, { name => 'version' }, { name => 'upgrade' }
+                ],
+                closure_custom_output => $self->can('custom_status_output'),
+                closure_custom_perfdata => sub { return 0; },
+                closure_custom_threshold_check => \&catalog_status_threshold_ng
+            }
+        }
+    ];
+}
+
+sub custom_status_output {
+    my ($self, %options) = @_;
+
+    return sprintf(
+        "'%s': version is '%s', upgrade is '%s'",
+        $self->{result_values}->{model},
+        $self->{result_values}->{version},
+        $self->{result_values}->{upgrade} ? 'available' : 'unavailable'
+    );
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options, force_new_perfdata => 1);
+    bless $self, $class;
+
+    $options{options}->add_options(arguments => {
+    });
+
+    return $self;
+}
+
+my $mapping = {
+    model   => { oid => '.1.3.6.1.4.1.55062.1.12.3' }, # systemModel
+    version => { oid => '.1.3.6.1.4.1.55062.1.12.6' }, # firmwareVersion
+    upgrade => { oid => '.1.3.6.1.4.1.55062.1.12.7' } # firmwareUpgradeAvailable
+};
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    my $snmp_result = $options{snmp}->get_leef(
+        oids => [ map($_->{oid} . '.0', values(%$mapping)) ],
+        nothing_quit => 1
+    );
+    $snmp_result->{$mapping->{version}->{oid} . '.0'} =~ s/\r*\n*$//;
+    $self->{global} = $options{snmp}->map_instance(mapping => $mapping, results => $snmp_result, instance => 0);
+
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check upgrade status
+
+=over 8
+
+=item B<--warning-status>
+
+Set warning threshold for status (Default : '%{upgrade} != 0').
+Can used special variables like: %{model}, %{version}, %{upgrade}
+
+=item B<--critical-status>
+
+Set critical threshold for status.
+Can used special variables like: %{model}, %{version}, %{upgrade}
+
+=back
+
+=cut
diff --git a/centreon-plugins/storage/qnap/snmp/plugin.pm b/centreon-plugins/storage/qnap/snmp/plugin.pm
index 78d8f29a4..22fe79c65 100644
--- a/centreon-plugins/storage/qnap/snmp/plugin.pm
+++ b/centreon-plugins/storage/qnap/snmp/plugin.pm
@@ -40,6 +40,7 @@ sub new {
         'pools'           => 'storage::qnap::snmp::mode::pools',
         'storage'         => 'snmp_standard::mode::storage',
         'time'            => 'snmp_standard::mode::ntp',
+        'upgrade'         => 'storage::qnap::snmp::mode::upgrade',
         'uptime'          => 'snmp_standard::mode::uptime',
         'volumes'         => 'storage::qnap::snmp::mode::volumes'
     };