diff --git a/3rdparty/d3d12memalloc/CMakeLists.txt b/3rdparty/d3d12memalloc/CMakeLists.txt
index c0c96d9627..ac9bc5478a 100644
--- a/3rdparty/d3d12memalloc/CMakeLists.txt
+++ b/3rdparty/d3d12memalloc/CMakeLists.txt
@@ -4,4 +4,4 @@ add_library(D3D12MemAlloc
 )
 
 target_include_directories(D3D12MemAlloc PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
-
+disable_compiler_warnings_for_target(D3D12MemAlloc)
diff --git a/3rdparty/demangler/src/CMakeLists.txt b/3rdparty/demangler/src/CMakeLists.txt
index 6d4598224e..196ba681e9 100644
--- a/3rdparty/demangler/src/CMakeLists.txt
+++ b/3rdparty/demangler/src/CMakeLists.txt
@@ -14,3 +14,4 @@ target_include_directories(demangler PUBLIC ${PROJECT_SOURCE_DIR}/include/)
 
 set_property(TARGET demangler PROPERTY CXX_STANDARD 17)
 set_property(TARGET demangler PROPERTY CXX_STANDARD_REQUIRED ON)
+disable_compiler_warnings_for_target(demangler)
diff --git a/3rdparty/jpgd/CMakeLists.txt b/3rdparty/jpgd/CMakeLists.txt
index d22505b312..26532c77dd 100644
--- a/3rdparty/jpgd/CMakeLists.txt
+++ b/3rdparty/jpgd/CMakeLists.txt
@@ -9,4 +9,5 @@ add_library(jpgd
 target_include_directories(jpgd PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
 set_property(TARGET jpgd PROPERTY CXX_STANDARD 17)
 set_property(TARGET jpgd PROPERTY CXX_STANDARD_REQUIRED ON)
+disable_compiler_warnings_for_target(jpgd)
 
diff --git a/3rdparty/libpng/CMakeLists.txt b/3rdparty/libpng/CMakeLists.txt
index 4019bd44b0..ea286e36ed 100644
--- a/3rdparty/libpng/CMakeLists.txt
+++ b/3rdparty/libpng/CMakeLists.txt
@@ -19,3 +19,4 @@ add_library(png
 target_link_libraries(png PRIVATE ZLIB::ZLIB)
 target_include_directories(png PUBLIC .)
 add_library(PNG::PNG ALIAS png)
+disable_compiler_warnings_for_target(png)
diff --git a/3rdparty/xz/CMakeLists.txt b/3rdparty/xz/CMakeLists.txt
index 30091e623a..d5303b725c 100644
--- a/3rdparty/xz/CMakeLists.txt
+++ b/3rdparty/xz/CMakeLists.txt
@@ -156,3 +156,5 @@ target_include_directories(xz-lzma
 		xz/src/liblzma/simple
 )
 add_library(LibLZMA::LibLZMA ALIAS xz-lzma)
+
+disable_compiler_warnings_for_target(xz-lzma)
diff --git a/3rdparty/zlib/CMakeLists.txt b/3rdparty/zlib/CMakeLists.txt
index 99ced658c0..a6dbd260fa 100644
--- a/3rdparty/zlib/CMakeLists.txt
+++ b/3rdparty/zlib/CMakeLists.txt
@@ -29,3 +29,5 @@ add_library(pcsx2-zlib
 target_include_directories(pcsx2-zlib PUBLIC .)
 
 add_library(ZLIB::ZLIB ALIAS pcsx2-zlib)
+
+disable_compiler_warnings_for_target(pcsx2-zlib)
diff --git a/cmake/Pcsx2Utils.cmake b/cmake/Pcsx2Utils.cmake
index 82fea16f48..4ef3cdf35b 100644
--- a/cmake/Pcsx2Utils.cmake
+++ b/cmake/Pcsx2Utils.cmake
@@ -256,3 +256,11 @@ function(fixup_file_properties target)
 		endforeach()
 	endif()
 endfunction()
+
+function(disable_compiler_warnings_for_target target)
+	if(MSVC)
+		target_compile_options(${target} PRIVATE "/W0")
+	else()
+		target_compile_options(${target} PRIVATE "-w")
+	endif()
+endfunction()
diff --git a/cmake/SearchForStuff.cmake b/cmake/SearchForStuff.cmake
index b9d1dee61d..319659a7c6 100644
--- a/cmake/SearchForStuff.cmake
+++ b/cmake/SearchForStuff.cmake
@@ -177,6 +177,7 @@ add_subdirectory(3rdparty/jpgd EXCLUDE_FROM_ALL)
 add_subdirectory(3rdparty/simpleini EXCLUDE_FROM_ALL)
 add_subdirectory(3rdparty/imgui EXCLUDE_FROM_ALL)
 add_subdirectory(3rdparty/cpuinfo EXCLUDE_FROM_ALL)
+disable_compiler_warnings_for_target(cpuinfo)
 add_subdirectory(3rdparty/zydis EXCLUDE_FROM_ALL)
 add_subdirectory(3rdparty/zstd EXCLUDE_FROM_ALL)
 add_subdirectory(3rdparty/libzip EXCLUDE_FROM_ALL)
@@ -192,7 +193,12 @@ endif()
 
 if(CUBEB_API)
 	add_subdirectory(3rdparty/cubeb EXCLUDE_FROM_ALL)
-	target_compile_options(cubeb PRIVATE "-w")
-	target_compile_options(speex PRIVATE "-w")
+	disable_compiler_warnings_for_target(cubeb)
+	disable_compiler_warnings_for_target(speex)
 endif()
 
+# Deliberately at the end. We don't want to set the flag on third-party projects.
+if(MSVC)
+	# Don't warn about "deprecated" POSIX functions.
+	add_definitions("-D_CRT_SECURE_NO_WARNINGS" "-DCRT_SECURE_NO_DEPRECATE")
+endif()