diff --git a/dm/test/fuzztest/displaymanager_fuzzer/displaymanager_fuzzer.cpp b/dm/test/fuzztest/displaymanager_fuzzer/displaymanager_fuzzer.cpp
index 5b6c8adb..90a094f5 100644
--- a/dm/test/fuzztest/displaymanager_fuzzer/displaymanager_fuzzer.cpp
+++ b/dm/test/fuzztest/displaymanager_fuzzer/displaymanager_fuzzer.cpp
@@ -15,6 +15,7 @@
 
 #include "displaymanager_fuzzer.h"
 
+#include <securec.h>
 #include "display_manager.h"
 
 namespace OHOS ::Rosen {
@@ -45,8 +46,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 bool DisplayFuzzTest(const uint8_t* data, size_t size)
diff --git a/dm/test/fuzztest/displaymanageripc_fuzzer/displaymanageripc_fuzzer.cpp b/dm/test/fuzztest/displaymanageripc_fuzzer/displaymanageripc_fuzzer.cpp
index 1e0ad7c1..3f4fc1f7 100644
--- a/dm/test/fuzztest/displaymanageripc_fuzzer/displaymanageripc_fuzzer.cpp
+++ b/dm/test/fuzztest/displaymanageripc_fuzzer/displaymanageripc_fuzzer.cpp
@@ -17,6 +17,7 @@
 
 #include <iremote_broker.h>
 #include <iservice_registry.h>
+#include <securec.h>
 #include <system_ability_definition.h>
 
 #include "display_manager_interface.h"
@@ -33,8 +34,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 std::pair<sptr<IDisplayManager>, sptr<IRemoteObject>> GetProxy()
diff --git a/dm/test/fuzztest/screen_fuzzer/screen_fuzzer.cpp b/dm/test/fuzztest/screen_fuzzer/screen_fuzzer.cpp
index 0facdf93..a9442345 100644
--- a/dm/test/fuzztest/screen_fuzzer/screen_fuzzer.cpp
+++ b/dm/test/fuzztest/screen_fuzzer/screen_fuzzer.cpp
@@ -16,6 +16,7 @@
 #include "screen_fuzzer.h"
 
 #include <iostream>
+#include <securec.h>
 
 #include "display_manager.h"
 #include "display.h"
@@ -31,8 +32,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 bool ScreenFuzzTest(const uint8_t *data, size_t size)
diff --git a/dm/test/fuzztest/screenmanager_fuzzer/screenmanager_fuzzer.cpp b/dm/test/fuzztest/screenmanager_fuzzer/screenmanager_fuzzer.cpp
index 737d74e7..0ce9ff02 100644
--- a/dm/test/fuzztest/screenmanager_fuzzer/screenmanager_fuzzer.cpp
+++ b/dm/test/fuzztest/screenmanager_fuzzer/screenmanager_fuzzer.cpp
@@ -16,6 +16,7 @@
 #include "screenmanager_fuzzer.h"
 
 #include <iostream>
+#include <securec.h>
 
 #include "dm_common.h"
 #include "screen.h"
@@ -51,8 +52,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 bool ScreenPowerFuzzTest(const uint8_t *data, size_t size)
diff --git a/wm/test/fuzztest/windowipc_fuzzer/windowipc_fuzzer.cpp b/wm/test/fuzztest/windowipc_fuzzer/windowipc_fuzzer.cpp
index 528d7bae..07d78dac 100644
--- a/wm/test/fuzztest/windowipc_fuzzer/windowipc_fuzzer.cpp
+++ b/wm/test/fuzztest/windowipc_fuzzer/windowipc_fuzzer.cpp
@@ -17,6 +17,7 @@
 
 #include <iremote_broker.h>
 #include <iservice_registry.h>
+#include <securec.h>
 #include <system_ability_definition.h>
 
 #include "zidl/window_manager_proxy.h"
@@ -33,8 +34,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 std::pair<sptr<IWindowManager>, sptr<IRemoteObject>> GetProxy()
diff --git a/wm/test/fuzztest/windowscene_fuzzer/windowscene_fuzzer.cpp b/wm/test/fuzztest/windowscene_fuzzer/windowscene_fuzzer.cpp
index 20c7804c..c0faa60d 100644
--- a/wm/test/fuzztest/windowscene_fuzzer/windowscene_fuzzer.cpp
+++ b/wm/test/fuzztest/windowscene_fuzzer/windowscene_fuzzer.cpp
@@ -13,6 +13,10 @@
  * limitations under the License.
  */
 
+#include "windowscene_fuzzer.h"
+
+#include <securec.h>
+
 #include "display_manager.h"
 #include "window.h"
 #include "window_manager.h"
@@ -55,8 +59,7 @@ size_t GetObject(T &object, const uint8_t *data, size_t size)
     if (objectSize > size) {
         return 0;
     }
-    std::memcpy(&object, data, objectSize);
-    return objectSize;
+    return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
 }
 
 size_t InitWindowOption1(WindowOption &windowOption, const uint8_t *data, size_t size)