diff --git a/scapy/utils.py b/scapy/utils.py
index c9d673c9244..f7ecf6d447c 100644
--- a/scapy/utils.py
+++ b/scapy/utils.py
@@ -19,6 +19,7 @@
 import collections
 import decimal
 import difflib
+import enum
 import gzip
 import inspect
 import locale
@@ -3566,7 +3567,38 @@ def whois(ip_address):
 ####################
 
 
-class CLIUtil:
+class _CLIUtilMetaclass(type):
+    class TYPE(enum.Enum):
+        COMMAND = 0
+        OUTPUT = 1
+        COMPLETE = 2
+
+    def __new__(cls,  # type: Type[_CLIUtilMetaclass]
+                name,  # type: str
+                bases,  # type: Tuple[type, ...]
+                dct  # type: Dict[str, Any]
+                ):
+        # type: (...) -> Type[CLIUtil]
+        dct["commands"] = {
+            x.__name__: x
+            for x in dct.values()
+            if getattr(x, "cliutil_type", None) == _CLIUtilMetaclass.TYPE.COMMAND
+        }
+        dct["commands_output"] = {
+            x.cliutil_ref.__name__: x
+            for x in dct.values()
+            if getattr(x, "cliutil_type", None) == _CLIUtilMetaclass.TYPE.OUTPUT
+        }
+        dct["commands_complete"] = {
+            x.cliutil_ref.__name__: x
+            for x in dct.values()
+            if getattr(x, "cliutil_type", None) == _CLIUtilMetaclass.TYPE.COMPLETE
+        }
+        newcls = cast(Type['CLIUtil'], type.__new__(cls, name, bases, dct))
+        return newcls
+
+
+class CLIUtil(metaclass=_CLIUtilMetaclass):
     """
     Provides a Util class to easily create simple CLI tools in Scapy,
     that can still be used as an API.
@@ -3594,6 +3626,14 @@ def _depcheck(self) -> None:
     # provides completion to command
     commands_complete: Dict[str, Callable[..., List[str]]] = {}
 
+    def __init__(self, cli: bool = True, debug: bool = False) -> None:
+        """
+        DEV: overwrite
+        """
+        if cli:
+            self._depcheck()
+            self.loop(debug=debug)
+
     @staticmethod
     def _inspectkwargs(func: DecoratorCallable) -> None:
         """
@@ -3655,7 +3695,7 @@ def addcommand(
         Decorator to register a command
         """
         def func(cmd: DecoratorCallable) -> DecoratorCallable:
-            cls.commands[cmd.__name__] = cmd
+            cmd.cliutil_type = _CLIUtilMetaclass.TYPE.COMMAND  # type: ignore
             cmd._spaces = spaces  # type: ignore
             cmd._globsupport = globsupport  # type: ignore
             cls._inspectkwargs(cmd)
@@ -3670,7 +3710,8 @@ def addoutput(cls, cmd: DecoratorCallable) -> Callable[[DecoratorCallable], Deco
         Decorator to register a command output processor
         """
         def func(processor: DecoratorCallable) -> DecoratorCallable:
-            cls.commands_output[cmd.__name__] = processor
+            processor.cliutil_type = _CLIUtilMetaclass.TYPE.OUTPUT  # type: ignore
+            processor.cliutil_ref = cmd  # type: ignore
             cls._inspectkwargs(processor)
             return processor
         return func
@@ -3681,7 +3722,8 @@ def addcomplete(cls, cmd: DecoratorCallable) -> Callable[[DecoratorCallable], De
         Decorator to register a command completor
         """
         def func(processor: DecoratorCallable) -> DecoratorCallable:
-            cls.commands_complete[cmd.__name__] = processor
+            processor.cliutil_type = _CLIUtilMetaclass.TYPE.COMPLETE  # type: ignore
+            processor.cliutil_ref = cmd  # type: ignore
             return processor
         return func
 
diff --git a/test/regression.uts b/test/regression.uts
index 2dfae7dd044..6ff43dae945 100644
--- a/test/regression.uts
+++ b/test/regression.uts
@@ -4937,3 +4937,34 @@ def _test_fragleak(func, sr1, select, L3socket):
 
 assert _test_fragleak(fragleak)
 assert _test_fragleak(fragleak2)
+
++ CLIUtil
+~ cliutil
+
+= CLIUtil: define and check overlap
+
+from scapy.layers.smbclient import smbclient
+
+class CLI1(CLIUtil):
+    @CLIUtil.addcommand()
+    def shares(self):
+        return 1
+    @CLIUtil.addoutput(shares)
+    def shares_output(self, results):
+        print(results)
+
+
+class CLI2(CLIUtil):
+    @CLIUtil.addcommand()
+    def shares(self):
+        return 2
+    @CLIUtil.addoutput(shares)
+    def shares_output(self, results):
+        print(results)
+
+
+c1 = CLI1(cli=False)
+c2 = CLI2(cli=False)
+
+assert c1.shares() == 1
+assert c2.shares() == 2