diff --git a/boot/boot_serial/src/boot_serial.c b/boot/boot_serial/src/boot_serial.c
index 7d15ce1..baff764 100644
--- a/boot/boot_serial/src/boot_serial.c
+++ b/boot/boot_serial/src/boot_serial.c
@@ -102,6 +102,20 @@
     .backups = &dummy_backups
 };
 
+/**
+ * Function that processes MGMT_GROUP_ID_PERUSER mcumgr commands.
+ * The function is system specific as the PERUSER commands are system specific.
+ *
+ * @param[in] hdr -- the decoded header of mcumgr message;
+ * @param[in] buffer -- buffer with first mcumgr message;
+ * @param[in] len -- length of of data in buffer;
+ * @param[out] *cs -- object with encoded response.
+ *
+ * @return 0 on success; non-0 error code otherwise.
+ */
+extern int bs_peruser_system_specific(const struct nmgr_hdr *hdr,
+                                      const char *buffer,
+                                      int len, cbor_state_t *cs);
 
 /*
  * Convert version into string without use of snprintf().
@@ -486,6 +500,11 @@
         default:
             break;
         }
+    } else if (MCUBOOT_PERUSER_MGMT_GROUP_ENABLED == 1 &&
+               hdr->nh_group >= MGMT_GROUP_ID_PERUSER) {
+        if (bs_peruser_system_specific(hdr, buf, len, &cbor_state) == 0) {
+            boot_serial_output();
+        }
     }
 }
 
diff --git a/boot/boot_serial/src/boot_serial_priv.h b/boot/boot_serial/src/boot_serial_priv.h
index 9275f3f..f17a2fc 100644
--- a/boot/boot_serial/src/boot_serial_priv.h
+++ b/boot/boot_serial/src/boot_serial_priv.h
@@ -36,13 +36,17 @@
 /*
  * From newtmgr.h
  */
+#define MGMT_ERR_OK             0
+#define MGMT_ERR_EUNKNOWN       2
 #define MGMT_ERR_EINVAL         3
+#define MGMT_ERR_ENOTSUP        8
 
 #define NMGR_OP_READ            0
 #define NMGR_OP_WRITE           2
 
 #define MGMT_GROUP_ID_DEFAULT   0
 #define MGMT_GROUP_ID_IMAGE     1
+#define MGMT_GROUP_ID_PERUSER  64
 
 #define NMGR_ID_CONS_ECHO_CTRL  1
 #define NMGR_ID_RESET           5
diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index dde97dd..8ef5345 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -552,6 +552,16 @@
 	  This option specifies the name of UART device to be used for
 	  serial recovery.
 
+config ENABLE_MGMT_PERUSER
+	bool "Enables system specific mcumgr commands"
+	depends on BOOT_SERIAL_UART
+	help
+	  The option enables processing of system specific mcumgr commands;
+	  system specific commands are within group MGMT_GROUP_ID_PERUSER (64)
+	  and above, as defined within mcumgr library.
+	  These are system specific command and system specific implementation
+	  function is required to process these commands.
+
 endif # MCUBOOT_SERIAL
 
 config BOOT_INTR_VEC_RELOC
diff --git a/boot/zephyr/boot_serial_extensions.c b/boot/zephyr/boot_serial_extensions.c
new file mode 100644
index 0000000..9983f62
--- /dev/null
+++ b/boot/zephyr/boot_serial_extensions.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr.h>
+#include <drivers/flash.h>
+#include <mgmt/mcumgr/zephyr_groups.h>
+
+#include <flash_map_backend/flash_map_backend.h>
+#include <sysflash/sysflash.h>
+
+#include "bootutil/bootutil_log.h"
+#include "../boot_serial/src/boot_serial_priv.h"
+#include "../boot_serial/src/cbor_encode.h"
+
+MCUBOOT_LOG_MODULE_DECLARE(mcuboot);
+
+int bs_peruser_system_specific(const struct nmgr_hdr *hdr, const char *buffer,
+                               int len, cbor_state_t *cs)
+{
+    const struct flash_area *fa;
+    int rc = flash_area_open(FLASH_AREA_ID(storage), &fa);
+
+    if (rc < 0) {
+        LOG_ERR("failed to open flash area");
+    } else {
+	rc = flash_area_erase(fa, 0, FLASH_AREA_SIZE(storage));
+	if (rc < 0) {
+		LOG_ERR("failed to erase flash area");
+	}
+	flash_area_close(fa);
+    }
+
+    map_start_encode(cs, 10);
+    tstrx_put(cs, "rc");
+    if (rc != 0) {
+        uintx32_put(cs, MGMT_ERR_EUNKNOWN);
+    } else {
+        uintx32_put(cs, 0);
+    }
+    map_end_encode(cs, 10);
+
+    return rc;
+}