diff --git a/.cspell.json b/.cspell.json
index c24d14b1715..ea7689601ab 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -11,7 +11,7 @@
         "Bodyless", "HTTPGET", "ratelimiter", "Ratelimiter", "STDMETHODCALLTYPE", "CANTSAVE", "OLECHAR", "DISPID",
         "UNKNOWNNAME", "DISPPARAMS", "XMLHTTP", "comptr", "Metadataservice", "Streamfn", "HWAVEOUT", "matdesc",
         "Presigner", "xindex", "errortype", "waveout", "WAVEOUTCAPSA", "ALLOWSYNC", "WAVEHDR", "MMSYSERR",
-        "WAVEFORMATEX", "Unprepare", "DDISABLE_IMDSV1", "SENDREQUEST", "threadpool",
+        "WAVEFORMATEX", "Unprepare", "DDISABLE_IMDSV1", "SENDREQUEST", "threadpool", "stdlib", "ALLOC",
         // AWS general
         "Arns", "AMZN", "amzn", "Paulo", "Ningxia", "ISOB", "isob", "AWSXML", "IMDSV", "AWSSTL",
         // AWS Signature
@@ -39,7 +39,7 @@
         // MSVC
         "msvc", "MSFT", "LPDWORD", "DATAW", "mkgmtime", "vscprintf", "wtoi", "msxml", "runtimeobject", "winhttp",
         "Wininet", "HINTERNET", "ADDREQ", "LPCSTR", "MAKELANGID", "SUBLANG", "WSADATA", "Initate", "ioctlsocket",
-        "dupenv", "USERPROFILE", "subblock", "LANGANDCODEPAGE",
+        "dupenv", "USERPROFILE", "subblock", "LANGANDCODEPAGE", "CPPUNWIND",
         // Crypto
         "decryptor", "encryptor", "NTSTATUS", "PBYTE", "PUCHAR", "noconf", "HAMC", "PBCRYPT", "BCRYPT", "libcrypto",
         "AWSLC", "CBCCTS", "tweaklen", "taglen", "blockcipher", "AESGCM", "compated", "outdata", "Decrypto", "GCMAAD",
diff --git a/src/aws-cpp-sdk-core/CMakeLists.txt b/src/aws-cpp-sdk-core/CMakeLists.txt
index b1881deadfa..c0f30e2974e 100644
--- a/src/aws-cpp-sdk-core/CMakeLists.txt
+++ b/src/aws-cpp-sdk-core/CMakeLists.txt
@@ -534,6 +534,13 @@ if(MSVC)
 
 endif(MSVC)
 
+check_cxx_source_compiles("
+        #include <stdlib.h>
+        int main() {
+            void* ptr = aligned_alloc(24, 64);
+            return 0;
+        }" AWS_HAS_ALIGNED_ALLOC)
+
 add_library(${PROJECT_NAME} ${AWS_NATIVE_SDK_SRC})
 add_library(AWS::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
@@ -561,6 +568,10 @@ if (CURL_HAS_TLS_PROXY)
     target_compile_definitions(${PROJECT_NAME} PRIVATE "CURL_HAS_TLS_PROXY")
 endif()
 
+if (AWS_HAS_ALIGNED_ALLOC)
+    target_compile_definitions(${PROJECT_NAME} PRIVATE "AWS_HAS_ALIGNED_ALLOC")
+endif()
+
 set(Core_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/include/")
 
 if(PLATFORM_CUSTOM)
diff --git a/src/aws-cpp-sdk-core/include/aws/core/utils/memory/AWSMemory.h b/src/aws-cpp-sdk-core/include/aws/core/utils/memory/AWSMemory.h
index 125b4e05a53..16960f0a465 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/utils/memory/AWSMemory.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/utils/memory/AWSMemory.h
@@ -38,6 +38,11 @@ namespace Aws
              */
             AWS_CORE_API MemorySystemInterface* GetMemorySystem();
 
+            /**
+             * Get the pointer to the SDK default memory system
+             */
+            AWS_CORE_API MemorySystemInterface& GetDefaultMemorySystem();
+
         } // namespace Memory
     } // namespace Utils
 
diff --git a/src/aws-cpp-sdk-core/source/Aws.cpp b/src/aws-cpp-sdk-core/source/Aws.cpp
index 686d67d4e6f..9042176df8a 100644
--- a/src/aws-cpp-sdk-core/source/Aws.cpp
+++ b/src/aws-cpp-sdk-core/source/Aws.cpp
@@ -45,6 +45,10 @@ namespace Aws
         {
             Aws::Utils::Memory::InitializeAWSMemorySystem(*options.memoryManagementOptions.memoryManager);
         }
+        else
+        {
+            Aws::Utils::Memory::InitializeAWSMemorySystem(Utils::Memory::GetDefaultMemorySystem());
+        }
 #endif // USE_AWS_MEMORY_MANAGEMENT
         Aws::Client::CoreErrorsMapper::InitCoreErrorsMapper();
         if(options.loggingOptions.logLevel != Aws::Utils::Logging::LogLevel::Off)
diff --git a/src/aws-cpp-sdk-core/source/utils/memory/AWSMemory.cpp b/src/aws-cpp-sdk-core/source/utils/memory/AWSMemory.cpp
index 21627e98010..074450f4e2d 100644
--- a/src/aws-cpp-sdk-core/source/utils/memory/AWSMemory.cpp
+++ b/src/aws-cpp-sdk-core/source/utils/memory/AWSMemory.cpp
@@ -59,6 +59,71 @@ MemorySystemInterface* GetMemorySystem()
     #endif // USE_AWS_MEMORY_MANAGEMENT
 }
 
+#if defined(__cpp_exceptions) || defined(_CPPUNWIND) || defined(__EXCEPTIONS)
+#define AWS_HAS_EXCEPTIONS
+#endif
+
+/**
+ * A default memory allocator
+ * It is used in case of custom memory management SDK build
+ *   and no custom allocator provided by application.
+ */
+class AwsDefaultMemorySystem : public MemorySystemInterface
+{
+public:
+#if defined(AWS_HAS_EXCEPTIONS)
+    static std::bad_alloc s_OOM;
+#endif
+    static AwsDefaultMemorySystem s_defMemSystem;
+
+    virtual ~AwsDefaultMemorySystem() = default;
+
+    void Begin() override
+    {
+    }
+
+    void End() override
+    {
+    }
+
+    void* AllocateMemory(std::size_t blockSize, std::size_t alignment, const char *allocationTag = nullptr) override
+    {
+        AWS_UNREFERENCED_PARAM(allocationTag);
+        void *ret;
+
+#if defined(AWS_HAS_ALIGNED_ALLOC)
+        if (alignment == 1) {
+            ret = malloc(blockSize);
+        } else {
+            ret = aligned_alloc(alignment, blockSize);
+        }
+#else
+        AWS_UNREFERENCED_PARAM(alignment);
+        ret = malloc(blockSize);
+#endif
+        if (ret == nullptr) {
+#if defined(AWS_HAS_EXCEPTIONS)
+            throw s_OOM;
+#endif
+        }
+        return ret;
+    }
+
+    void FreeMemory(void* memoryPtr) override
+    {
+        free(memoryPtr);
+    }
+};
+#if defined(AWS_HAS_EXCEPTIONS)
+std::bad_alloc AwsDefaultMemorySystem::s_OOM;
+#endif
+AwsDefaultMemorySystem AwsDefaultMemorySystem::s_defMemSystem;
+
+MemorySystemInterface& GetDefaultMemorySystem()
+{
+    return AwsDefaultMemorySystem::s_defMemSystem;
+}
+
 } // namespace Memory
 } // namespace Utils
 
@@ -67,7 +132,7 @@ void* Malloc(const char* allocationTag, size_t allocationSize)
     Aws::Utils::Memory::MemorySystemInterface* memorySystem = Aws::Utils::Memory::GetMemorySystem();
 #ifdef USE_AWS_MEMORY_MANAGEMENT
     // Was InitAPI forgotten or ShutdownAPI already called or Aws:: class used as static?
-    // TODO: enforce to non-conditional assert AWS_ASSERT
+    // TODO: enforce to non-conditional assert
     AWS_ASSERT(memorySystem && "Memory system is not initialized.");
 #endif
 
diff --git a/tests/aws-cpp-sdk-eventbridge-tests/EventBridgeTests.cpp b/tests/aws-cpp-sdk-eventbridge-tests/EventBridgeTests.cpp
index cd0892f4143..b6596b6426c 100644
--- a/tests/aws-cpp-sdk-eventbridge-tests/EventBridgeTests.cpp
+++ b/tests/aws-cpp-sdk-eventbridge-tests/EventBridgeTests.cpp
@@ -137,12 +137,12 @@ struct EventBridgeEndpointTestCase
 
     const char* expectedEndpointId;
     const char* expectedException;
-    using ExpectedHeaders = Aws::Vector<std::pair<const char*, const char*>>;
+    using ExpectedHeaders = std::vector<std::pair<const char*, const char*>>;
     ExpectedHeaders expectedHeaders;
 };
 
 static const std::pair<const char*, const char*> X_AMZ_HEADER = {"x-amz-region-set", "*"};
-static const Aws::Vector<EventBridgeEndpointTestCase> TEST_CASES = {
+static const std::vector<EventBridgeEndpointTestCase> TEST_CASES = {
         {"us-east-1", false, false, nullptr, "events.us-east-1.amazonaws.com", nullptr, {}},
         {"us-east-1", false, false, "abc123.456def", "abc123.456def.endpoint.events.amazonaws.com", nullptr, {X_AMZ_HEADER}},
         {"us-east-1", false, false, "badactor.aws?foo=bar", nullptr, "EndpointId must be a valid host label.", {}},