diff --git a/components/openthread/src/esp_openthread_cli.c b/components/openthread/src/esp_openthread_cli.c
index 83bda1d2ca3..c709e5889b3 100644
--- a/components/openthread/src/esp_openthread_cli.c
+++ b/components/openthread/src/esp_openthread_cli.c
@@ -60,6 +60,31 @@ static void ot_cli_set_read_characteristics(void)
     linenoiseSetReadFunction(ot_cli_read_bytes);
 }
 
+static bool append_escaped_ot_arg(char *buffer, size_t buffer_size, const char *arg)
+{
+    size_t len      = strlen(buffer);
+    size_t rem_size = (len < buffer_size) ? (buffer_size - len - 1) : 0;
+
+    ESP_RETURN_ON_FALSE(rem_size > 0, false, OT_PLAT_LOG_TAG, "CLI command buffer is full");
+
+    while (*arg) {
+        bool need_escape = (*arg == ' ') || (*arg == '\t') || (*arg == '\r') || (*arg == '\n') || (*arg == '\\');
+        size_t need = need_escape ? 2 : 1;
+
+        ESP_RETURN_ON_FALSE(rem_size >= need, false, OT_PLAT_LOG_TAG, "CLI command is too long");
+
+        if (need_escape) {
+            buffer[len++] = '\\';
+        }
+
+        buffer[len++] = *arg++;
+        rem_size -= need;
+    }
+
+    buffer[len] = '\0';
+    return true;
+}
+
 static int cli_output_callback(void *context, const char *format, va_list args)
 {
     char prompt_check[3];
@@ -108,10 +133,14 @@ static int ot_cli_console_callback(int argc, char **argv)
 {
     ESP_RETURN_ON_FALSE(argv[1] != NULL && strlen(argv[1]) > 0, ESP_FAIL, OT_PLAT_LOG_TAG, "Invalid OpenThread command");
     char cli_cmd[OT_CLI_MAX_LINE_LENGTH] = {0};
-    strncpy(cli_cmd, argv[1], sizeof(cli_cmd) - strlen(cli_cmd) - 1);
+    ESP_RETURN_ON_FALSE(append_escaped_ot_arg(cli_cmd, sizeof(cli_cmd), argv[1]), ESP_FAIL, OT_PLAT_LOG_TAG,
+                        "Failed to compose OpenThread command");
     for (int i = 2; i < argc; i++) {
+        ESP_RETURN_ON_FALSE(strlen(cli_cmd) < sizeof(cli_cmd) - 1, ESP_FAIL, OT_PLAT_LOG_TAG,
+                            "CLI command is too long");
         strncat(cli_cmd, " ", sizeof(cli_cmd) - strlen(cli_cmd) - 1);
-        strncat(cli_cmd, argv[i], sizeof(cli_cmd) - strlen(cli_cmd) - 1);
+        ESP_RETURN_ON_FALSE(append_escaped_ot_arg(cli_cmd, sizeof(cli_cmd), argv[i]), ESP_FAIL, OT_PLAT_LOG_TAG,
+                            "Failed to compose OpenThread command");
     }
     s_cli_task = xTaskGetCurrentTaskHandle();
     if (esp_openthread_cli_input(cli_cmd) == ESP_OK) {
diff --git a/components/openthread/src/port/esp_openthread_radio_spinel.cpp b/components/openthread/src/port/esp_openthread_radio_spinel.cpp
index f9695b23871..fa8c2e3f5a0 100644
--- a/components/openthread/src/port/esp_openthread_radio_spinel.cpp
+++ b/components/openthread/src/port/esp_openthread_radio_spinel.cpp
@@ -53,7 +53,9 @@ static otRadioCaps s_radio_caps = (OT_RADIO_CAPS_ENERGY_SCAN       |
                                    OT_RADIO_CAPS_RECEIVE_TIMING    |
                                    OT_RADIO_CAPS_TRANSMIT_TIMING   |
                                    OT_RADIO_CAPS_ACK_TIMEOUT       |
-                                   OT_RADIO_CAPS_SLEEP_TO_TX);
+                                   OT_RADIO_CAPS_SLEEP_TO_TX       |
+                                   OT_RADIO_CAPS_CSMA_BACKOFF      |
+                                   OT_RADIO_CAPS_TRANSMIT_RETRIES);
 
 static const char *radiospinel_workflow = "radio_spinel";
 static const esp_openthread_radio_config_t *s_esp_openthread_radio_config = NULL;
diff --git a/components/openthread/src/spinel/esp_radio_spinel.cpp b/components/openthread/src/spinel/esp_radio_spinel.cpp
index 3c35b0cbd8b..06ed3bc6e21 100644
--- a/components/openthread/src/spinel/esp_radio_spinel.cpp
+++ b/components/openthread/src/spinel/esp_radio_spinel.cpp
@@ -40,7 +40,9 @@ static otRadioCaps s_radio_caps = (OT_RADIO_CAPS_ENERGY_SCAN       |
                                    OT_RADIO_CAPS_RECEIVE_TIMING    |
                                    OT_RADIO_CAPS_TRANSMIT_TIMING   |
                                    OT_RADIO_CAPS_ACK_TIMEOUT       |
-                                   OT_RADIO_CAPS_SLEEP_TO_TX);
+                                   OT_RADIO_CAPS_SLEEP_TO_TX       |
+                                   OT_RADIO_CAPS_CSMA_BACKOFF      |
+                                   OT_RADIO_CAPS_TRANSMIT_RETRIES);
 
 static esp_radio_spinel_compatibility_error_callback s_radio_spinel_compatibility_error_callback = NULL;
 static esp_radio_spinel_coprocessor_reset_failure_callback s_radio_spinel_coprocessor_reset_failure_callback = NULL;