diff --git a/CMakeLists.txt b/CMakeLists.txt
index 570c29305..13b2ef936 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -246,7 +246,7 @@ IF( UNIX )
 ENDIF()
 
 # Grouped compiler settings ########################################
-IF ((CMAKE_C_COMPILER_ID MATCHES "GNU") AND NOT CMAKE_COMPILER_IS_MINGW)
+IF ((CMAKE_C_COMPILER_ID MATCHES "GNU") AND NOT MINGW)
   IF(NOT ASSIMP_HUNTER_ENABLED)
     SET(CMAKE_CXX_STANDARD 11)
     SET(CMAKE_POSITION_INDEPENDENT_CODE ON)
@@ -283,7 +283,7 @@ ELSEIF (CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
   ENDIF()
   SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wall -Wno-long-long ${CMAKE_CXX_FLAGS}" )
   SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
-ELSEIF( CMAKE_COMPILER_IS_MINGW )
+ELSEIF( MINGW )
   IF (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
     message(FATAL_ERROR "MinGW is too old to be supported. Please update MinGW and try again.")
   ELSEIF(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.3)
diff --git a/code/AssetLib/Blender/BlenderScene.cpp b/code/AssetLib/Blender/BlenderScene.cpp
index c93d913fc..9ad086fe6 100644
--- a/code/AssetLib/Blender/BlenderScene.cpp
+++ b/code/AssetLib/Blender/BlenderScene.cpp
@@ -49,8 +49,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "BlenderDNA.h"
 #include "BlenderSceneGen.h"
 
-using namespace Assimp;
-using namespace Assimp::Blender;
+namespace Assimp {
+namespace Blender {
 
 //--------------------------------------------------------------------------------
 template <>
@@ -885,4 +885,7 @@ void DNA::RegisterConverters() {
     converters["CollectionObject"] = DNA::FactoryPair(&Structure::Allocate<CollectionObject>, &Structure::Convert<CollectionObject>);
 }
 
+} // namespace Blender
+} //namespace Assimp
+
 #endif // ASSIMP_BUILD_NO_BLEND_IMPORTER
diff --git a/code/AssetLib/FBX/FBXConverter.cpp b/code/AssetLib/FBX/FBXConverter.cpp
index 5a3ae0ae7..b1be6ed37 100644
--- a/code/AssetLib/FBX/FBXConverter.cpp
+++ b/code/AssetLib/FBX/FBXConverter.cpp
@@ -2070,6 +2070,7 @@ void FBXConverter::SetTextureProperties(aiMaterial *out_mat, const LayeredTextur
     TrySetTextureProperties(out_mat, layeredTextures, "ShininessExponent", aiTextureType_SHININESS, mesh);
     TrySetTextureProperties(out_mat, layeredTextures, "EmissiveFactor", aiTextureType_EMISSIVE, mesh);
     TrySetTextureProperties(out_mat, layeredTextures, "TransparencyFactor", aiTextureType_OPACITY, mesh);
+    TrySetTextureProperties(out_mat, layeredTextures, "ReflectionFactor", aiTextureType_METALNESS, mesh);
 }
 
 aiColor3D FBXConverter::GetColorPropertyFactored(const PropertyTable &props, const std::string &colorName,
diff --git a/code/AssetLib/LWS/LWSLoader.cpp b/code/AssetLib/LWS/LWSLoader.cpp
index cb07787fa..cf04579b0 100644
--- a/code/AssetLib/LWS/LWSLoader.cpp
+++ b/code/AssetLib/LWS/LWSLoader.cpp
@@ -537,6 +537,11 @@ void LWSImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
 
     // get file format version and print to log
     ++it;
+    
+    if ((*it).tokens[0].empty()) {
+        ASSIMP_LOG_ERROR("Invalid LWS file detectedm abort import.");
+        return;
+    }
     unsigned int version = strtoul10((*it).tokens[0].c_str());
     ASSIMP_LOG_INFO("LWS file format version is ", (*it).tokens[0]);
     first = 0.;
diff --git a/code/AssetLib/MDL/MDLMaterialLoader.cpp b/code/AssetLib/MDL/MDLMaterialLoader.cpp
index 62320814a..4f441a054 100644
--- a/code/AssetLib/MDL/MDLMaterialLoader.cpp
+++ b/code/AssetLib/MDL/MDLMaterialLoader.cpp
@@ -463,8 +463,12 @@ void MDLImporter::ParseSkinLump_3DGS_MDL7(
             ASSIMP_LOG_WARN("Found a reference to an embedded DDS texture, "
                             "but texture height is not equal to 1, which is not supported by MED");
         }
-
-        pcNew.reset(new aiTexture());
+        if (iWidth == 0) {
+            ASSIMP_LOG_ERROR("Found a reference to an embedded DDS texture, but texture width is zero, aborting import.");
+            return;
+        }
+        
+        pcNew.reset(new aiTexture);
         pcNew->mHeight = 0;
         pcNew->mWidth = iWidth;
 
diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 1af9407d2..08efd28df 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -557,7 +557,7 @@ ADD_ASSIMP_IMPORTER( IFC
 if (ASSIMP_BUILD_IFC_IMPORTER)
   if (MSVC)
     set_source_files_properties(Importer/IFC/IFCReaderGen1_2x3.cpp Importer/IFC/IFCReaderGen2_2x3.cpp PROPERTIES COMPILE_FLAGS "/bigobj")
-  elseif(CMAKE_COMPILER_IS_MINGW)
+  elseif(MINGW)
     set_source_files_properties(Importer/IFC/IFCReaderGen1_2x3.cpp Importer/IFC/IFCReaderGen2_2x3.cpp PROPERTIES COMPILE_FLAGS "-O2 -Wa,-mbig-obj")
   endif()
 endif ()
@@ -862,7 +862,7 @@ ADD_ASSIMP_IMPORTER( MMD
 # optimizations that take up extra space. Given that the issue is a string table overflowing, -Os seemed appropriate
 # Also, I'm not positive if both link & compile flags are needed, but this hopefully ensures that the issue should not
 # recur for edge cases such as static builds.
-if ((CMAKE_COMPILER_IS_MINGW) AND (CMAKE_BUILD_TYPE MATCHES Debug))
+if ((MINGW) AND (CMAKE_BUILD_TYPE MATCHES Debug))
   message("-- Applying MinGW StepFileGen1.cpp Debug Workaround")
   SET_SOURCE_FILES_PROPERTIES(Importer/StepFile/StepFileGen1.cpp PROPERTIES COMPILE_FLAGS -Os )
   SET_SOURCE_FILES_PROPERTIES(Importer/StepFile/StepFileGen1.cpp PROPERTIES LINK_FLAGS -Os )
diff --git a/code/Common/BaseImporter.cpp b/code/Common/BaseImporter.cpp
index d7e24afab..82b8f12fc 100644
--- a/code/Common/BaseImporter.cpp
+++ b/code/Common/BaseImporter.cpp
@@ -65,6 +65,7 @@ using namespace Assimp;
 // Constructor to be privately used by Importer
 BaseImporter::BaseImporter() AI_NO_EXCEPT
         : m_progress() {
+    // empty
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -372,7 +373,10 @@ void BaseImporter::ConvertToUTF8(std::vector<char> &data) {
 
     // UTF 16 BE with BOM
     if (*((uint16_t *)&data.front()) == 0xFFFE) {
-
+        // Check to ensure no overflow can happen
+        if(data.size() % 2 != 0) {
+            return;
+        }
         // swap the endianness ..
         for (uint16_t *p = (uint16_t *)&data.front(), *end = (uint16_t *)&data.back(); p <= end; ++p) {
             ByteSwap::Swap2(p);
diff --git a/code/Common/DefaultProgressHandler.h b/code/Common/DefaultProgressHandler.h
index 4626204af..ebf4a0e74 100644
--- a/code/Common/DefaultProgressHandler.h
+++ b/code/Common/DefaultProgressHandler.h
@@ -4,7 +4,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2021, assimp team
 
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -48,18 +47,20 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/ProgressHandler.hpp>
 
-namespace Assimp    {
+namespace Assimp {
 
 // ------------------------------------------------------------------------------------
-/** @brief Internal default implementation of the #ProgressHandler interface. */
+/**
+ *  @brief Internal default implementation of the #ProgressHandler interface.
+ */
 class DefaultProgressHandler : public ProgressHandler    {
-
-    virtual bool Update(float /*percentage*/) {
+public:
+    ///	@brief Ignores the update callback.
+    bool Update(float) override {
         return false;
     }
+};
 
-
-}; // !class DefaultProgressHandler
 } // Namespace Assimp
 
-#endif
+#endif // INCLUDED_AI_DEFAULTPROGRESSHANDLER_H
diff --git a/code/Common/Importer.cpp b/code/Common/Importer.cpp
index 41b73fd12..2f9c23bec 100644
--- a/code/Common/Importer.cpp
+++ b/code/Common/Importer.cpp
@@ -329,7 +329,7 @@ bool Importer::IsDefaultIOHandler() const {
 
 // ------------------------------------------------------------------------------------------------
 // Supplies a custom progress handler to get regular callbacks during importing
-void Importer::SetProgressHandler ( ProgressHandler* pHandler ) {
+void Importer::SetProgressHandler(ProgressHandler* pHandler) {
     ai_assert(nullptr != pimpl);
 
     ASSIMP_BEGIN_EXCEPTION_REGION();
diff --git a/contrib/android-cmake/android.toolchain.cmake b/contrib/android-cmake/android.toolchain.cmake
index ffa26126a..c2b8a0730 100644
--- a/contrib/android-cmake/android.toolchain.cmake
+++ b/contrib/android-cmake/android.toolchain.cmake
@@ -1616,6 +1616,7 @@ endif()
 if( CMAKE_GENERATOR MATCHES "Ninja" AND CMAKE_HOST_WIN32 )
  # it is a bad hack after all
  # CMake generates Ninja makefiles with UNIX paths only if it thinks that we are going to build with MinGW
+ set( MINGW TRUE ) # tell CMake that we are MinGW
  set( CMAKE_COMPILER_IS_MINGW TRUE ) # tell CMake that we are MinGW
  set( CMAKE_CROSSCOMPILING TRUE )    # stop recursion
  enable_language( C )
diff --git a/include/assimp/ProgressHandler.hpp b/include/assimp/ProgressHandler.hpp
index a42015400..40661fba8 100644
--- a/include/assimp/ProgressHandler.hpp
+++ b/include/assimp/ProgressHandler.hpp
@@ -74,6 +74,7 @@ protected:
 public:
     /// @brief  Virtual destructor.
     virtual ~ProgressHandler () {
+        // empty
     }
 
     // -------------------------------------------------------------------
diff --git a/tools/assimp_cmd/Main.cpp b/tools/assimp_cmd/Main.cpp
index 8d76e1f5e..87467579f 100644
--- a/tools/assimp_cmd/Main.cpp
+++ b/tools/assimp_cmd/Main.cpp
@@ -5,8 +5,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2021, assimp team
 
-
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -47,6 +45,25 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "Main.h"
 
+#include <assimp/ProgressHandler.hpp>
+#include <iostream>
+
+class ConsoleProgressHandler : public ProgressHandler {
+public:
+	ConsoleProgressHandler() :
+			ProgressHandler() {
+		// empty
+	}
+
+	~ConsoleProgressHandler() override {
+		// empty
+	}
+
+	bool Update(float percentage) override {
+        std::cout << percentage * 100.0f << " %\n";
+		return true;
+    }
+};
 const char* AICMD_MSG_ABOUT =
 "------------------------------------------------------ \n"
 "Open Asset Import Library (\"Assimp\", https://github.com/assimp/assimp) \n"
@@ -73,10 +90,10 @@ const char* AICMD_MSG_HELP =
 "\n Use \'assimp <verb> --help\' for detailed help on a command.\n"
 ;
 
-/*extern*/ Assimp::Importer* globalImporter = NULL;
+/*extern*/ Assimp::Importer* globalImporter = nullptr;
 
 #ifndef ASSIMP_BUILD_NO_EXPORT
-/*extern*/ Assimp::Exporter* globalExporter = NULL;
+/*extern*/ Assimp::Exporter* globalExporter = nullptr;
 #endif
 
 // ------------------------------------------------------------------------------
@@ -286,6 +303,9 @@ const aiScene* ImportModel(
 
 	// do the actual import, measure time
 	const clock_t first = clock();
+    ConsoleProgressHandler *ph = new ConsoleProgressHandler;
+    globalImporter->SetProgressHandler(ph);
+    
 	const aiScene* scene = globalImporter->ReadFile(path,imp.ppFlags);
 
 	if (imp.showLog) {
@@ -305,6 +325,9 @@ const aiScene* ImportModel(
 	if (imp.log) {
 		FreeLogStreams();
 	}
+    globalImporter->SetProgressHandler(nullptr);
+    delete ph;
+
 	return scene;
 }