diff --git a/ReadCRDbgExt/Inc/ReadControlRegisters.h b/ReadCRDbgExt/Inc/ReadControlRegisters.h
index c4ede35..538073f 100644
--- a/ReadCRDbgExt/Inc/ReadControlRegisters.h
+++ b/ReadCRDbgExt/Inc/ReadControlRegisters.h
@@ -49,6 +49,38 @@ typedef union _CR0_FLAGS {
     };
     QWORD Value;
 } CR0_FLAGS, *PCR0_FLAGS;
+
+typedef union _CR4_FLAGS {
+    struct {
+        QWORD VME        : 1; // Virtual-8086 Mode Extensions
+        QWORD PVI        : 1; // Protected-Mode Virtual Interrupts
+        QWORD TSD        : 1; // Time Stamp Disable
+        QWORD DE         : 1; // Debugging Extensions
+        QWORD PSE        : 1; // Page Size Extensions
+        QWORD PAE        : 1; // Physical Address Extension
+        QWORD MCE        : 1; // Machine-Check Enable
+        QWORD PGE        : 1; // Page Global Enable
+        QWORD PCE        : 1; // Performance-Monitoring Counter Enable
+        QWORD OSFXSR     : 1; // Operating System Support for FXSAVE and FXRSTOR instructions
+        QWORD OSXMMEXCPT : 1; // Operating System Support for Unmasked SIMD Floating-Point Exceptions
+        QWORD UMIP       : 1; // User-Mode Instruction Prevention
+        QWORD LA57       : 1; // 57-bit linear addresses
+        QWORD VMXE       : 1; // VMX-Enable Bit
+        QWORD SMXE       : 1; // SMX-Enable Bit
+        QWORD Reserved1  : 1; // Reserved
+        QWORD FSGSBASE   : 1; // FSGSBASE-Enable Bit
+        QWORD PCIDE      : 1; // PCID-Enable Bit
+        QWORD OSXSAVE    : 1; // XSAVE and Processor Extended States-Enable Bit
+        QWORD KL         : 1; // Key-Locker-Enable Bit
+        QWORD SMEP       : 1; // SMEP-Enable Bit
+        QWORD SMAP       : 1; // SMAP-Enable Bit
+        QWORD PKE        : 1; // Enable protection keys for user-mode pages
+        QWORD CET        : 1; // Control-flow Enforcement Technology
+        QWORD PKS        : 1; // Enable protection keys for supervisor-mode pages
+        QWORD UINTR      : 1; // User Interrupts Enable Bit
+    };
+    QWORD Value;
+} CR4_FLAGS, *PCR4_FLAGS;
 #pragma warning(pop)
 
 #pragma endregion
@@ -89,4 +121,19 @@ extern "C" __declspec(dllexport) VOID __stdcall readcr0(
     _In_ PCSTR  strArgs
 );
 
+/// @brief Built-in command to display Control Register 4 (CR4) flags
+/// @param hCurrentProcess Handle for the current process
+/// @param hCurrentThread Handle for the current thread
+/// @param qwCurrentPc Program counter
+/// @param dwProcessor Current processor
+/// @param strArgs Command line arguments
+/// @return None
+extern "C" __declspec(dllexport) VOID __stdcall readcr4(
+    _In_ HANDLE hCurrentProcess,
+    _In_ HANDLE hCurrentThread,
+    _In_ QWORD  qwCurrentPc,
+    _In_ DWORD  dwProcessor,
+    _In_ PCSTR  strArgs
+);
+
 #pragma endregion
\ No newline at end of file
diff --git a/ReadCRDbgExt/Src/ReadControlRegisters.cpp b/ReadCRDbgExt/Src/ReadControlRegisters.cpp
index c36874d..0bf2fbb 100644
--- a/ReadCRDbgExt/Src/ReadControlRegisters.cpp
+++ b/ReadCRDbgExt/Src/ReadControlRegisters.cpp
@@ -41,6 +41,7 @@ VOID __stdcall help(
         "Help for debugger extension DLL ReadCRDbgExt.dll\n"
         "   help    - Show help menu\n"
         "   readcr0 - Display CR0 flags\n"
+        "   readcr4 - Display CR4 flags\n"
     );
 }
 
@@ -80,7 +81,7 @@ VOID __stdcall readcr0(
     // Display CR0 flags
     dprintf(
         "    |-----|------|--------|\n"
-        "    | %-3s | %-3s | %-6s |\n"
+        "    | %-3s | %-4s | %-6s |\n"
         "    |-----|------|--------|\n",
         "Bit", "Flag", "Status"
     );
@@ -160,4 +161,204 @@ cleanup:
     return;
 }
 
+VOID __stdcall readcr4(
+    _In_ HANDLE hCurrentProcess,
+    _In_ HANDLE hCurrentThread,
+    _In_ QWORD  qwCurrentPc,
+    _In_ DWORD  dwProcessor,
+    _In_ PCSTR  strArgs
+) {
+    UNREFERENCED_PARAMETER(hCurrentProcess);
+    UNREFERENCED_PARAMETER(hCurrentThread);
+    UNREFERENCED_PARAMETER(qwCurrentPc);
+    UNREFERENCED_PARAMETER(strArgs);
+
+    dprintf("[!] Current processor number = %d\n", dwProcessor);
+
+    // Init local variables
+    BOOLEAN bEvaluated = FALSE;
+    QWORD qwCR4 = 0;
+    CR4_FLAGS cr4Flags; ZERO_MEMORY(&cr4Flags, sizeof(CR4_FLAGS));
+
+    // Determine if the target uses 64-bit pointers
+    if (!IsPtr64()) {
+        dprintf("[-] IA-32 target is not supported by this extension!\n");
+        goto cleanup;
+    }
+
+    // Read CR4 value
+    bEvaluated = (BOOLEAN)GetExpressionEx("@cr4", &qwCR4, NULL);
+    if (!bEvaluated) {
+        dprintf("[-] Error evaluating MASM expression!\n");
+        goto cleanup;
+    }
+    dprintf("[+] CR4 = 0x%I64X\n", qwCR4);
+
+    // Display CR4 flags
+    dprintf(
+        "    |-----|------------|--------|\n"
+        "    | %-3s | %-10s | %-6s |\n"
+        "    |-----|------------|--------|\n",
+        "Bit", "Flag", "Status"
+    );
+
+    cr4Flags.Value = qwCR4;
+
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        0,
+        "VME",
+        cr4Flags.VME
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        1,
+        "PVI",
+        cr4Flags.PVI
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        2,
+        "TSD",
+        cr4Flags.TSD
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        3,
+        "DE",
+        cr4Flags.DE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        4,
+        "PSE",
+        cr4Flags.PSE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        5,
+        "PAE",
+        cr4Flags.PAE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        6,
+        "MCE",
+        cr4Flags.MCE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        7,
+        "PGE",
+        cr4Flags.PGE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        8,
+        "PCE",
+        cr4Flags.PCE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        9,
+        "OSFXSR",
+        cr4Flags.OSFXSR
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        10,
+        "OSXMMEXCPT",
+        cr4Flags.OSXMMEXCPT
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        11,
+        "UMIP",
+        cr4Flags.UMIP
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        12,
+        "LA57",
+        cr4Flags.LA57
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        13,
+        "VMXE",
+        cr4Flags.VMXE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        14,
+        "SMXE",
+        cr4Flags.SMXE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        16,
+        "FSGSBASE",
+        cr4Flags.FSGSBASE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        17,
+        "PCIDE",
+        cr4Flags.PCIDE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        18,
+        "OSXSAVE",
+        cr4Flags.OSXSAVE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        19,
+        "KL",
+        cr4Flags.KL
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        20,
+        "SMEP",
+        cr4Flags.SMEP
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        21,
+        "SMAP",
+        cr4Flags.SMAP
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        22,
+        "PKE",
+        cr4Flags.PKE
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        23,
+        "CET",
+        cr4Flags.CET
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        24,
+        "PKS",
+        cr4Flags.PKS
+    );
+    dprintf(
+        "    | %3d | %10s | %6d |\n",
+        25,
+        "UINTR",
+        cr4Flags.UINTR
+    );
+
+    dprintf("    |-----|------------|--------|\n");
+
+cleanup:
+    return;
+}
+
 #pragma endregion
\ No newline at end of file