diff --git a/source/blender/blenloader/intern/versioning_400.cc b/source/blender/blenloader/intern/versioning_400.cc
index 0462c91e227..f1bf5478403 100644
--- a/source/blender/blenloader/intern/versioning_400.cc
+++ b/source/blender/blenloader/intern/versioning_400.cc
@@ -8,6 +8,8 @@
 
 #define DNA_DEPRECATED_ALLOW
 
+#include <cmath>
+
 #include "CLG_log.h"
 
 #include "DNA_brush_types.h"
@@ -134,6 +136,24 @@ static void version_geometry_nodes_add_realize_instance_nodes(bNodeTree *ntree)
   }
 }
 
+/* Version VertexWeightEdit modifier to make existing weights exclusive of the threshold. */
+static void version_vertex_weight_edit_preserve_threshold_exclusivity(Main *bmain)
+{
+  LISTBASE_FOREACH (Object *, ob, &bmain->objects) {
+    if (ob->type != OB_MESH) {
+      continue;
+    }
+
+    LISTBASE_FOREACH (ModifierData *, md, &ob->modifiers) {
+      if (md->type == eModifierType_WeightVGEdit) {
+        WeightVGEditModifierData *wmd = reinterpret_cast<WeightVGEditModifierData *>(md);
+        wmd->add_threshold = nexttoward(wmd->add_threshold, 2.0);
+        wmd->rem_threshold = nexttoward(wmd->rem_threshold, -1.0);
+      }
+    }
+  }
+}
+
 static void version_mesh_crease_generic(Main &bmain)
 {
   LISTBASE_FOREACH (Mesh *, mesh, &bmain.meshes) {
@@ -337,6 +357,10 @@ void blo_do_versions_400(FileData *fd, Library * /*lib*/, Main *bmain)
     }
   }
 
+  if (!MAIN_VERSION_ATLEAST(bmain, 400, 11)) {
+    version_vertex_weight_edit_preserve_threshold_exclusivity(bmain);
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *
diff --git a/source/blender/makesrna/intern/rna_modifier.cc b/source/blender/makesrna/intern/rna_modifier.cc
index 9be3a0b1666..97faa97f509 100644
--- a/source/blender/makesrna/intern/rna_modifier.cc
+++ b/source/blender/makesrna/intern/rna_modifier.cc
@@ -5218,21 +5218,21 @@ static void rna_def_modifier_weightvgedit(BlenderRNA *brna)
 
   prop = RNA_def_property(srna, "add_threshold", PROP_FLOAT, PROP_NONE);
   RNA_def_property_float_sdna(prop, nullptr, "add_threshold");
-  RNA_def_property_range(prop, 0.0, 1.0);
+  RNA_def_property_range(prop, -1000.0, 1000.0);
   RNA_def_property_ui_range(prop, 0.0, 1.0, 1, -1);
   RNA_def_property_ui_text(prop,
                            "Add Threshold",
-                           "Lower bound for a vertex's weight "
+                           "Lower (inclusive) bound for a vertex's weight "
                            "to be added to the vgroup");
   RNA_def_property_update(prop, 0, "rna_Modifier_update");
 
   prop = RNA_def_property(srna, "remove_threshold", PROP_FLOAT, PROP_NONE);
   RNA_def_property_float_sdna(prop, nullptr, "rem_threshold");
-  RNA_def_property_range(prop, 0.0, 1.0);
+  RNA_def_property_range(prop, -1000.0, 1000.0);
   RNA_def_property_ui_range(prop, 0.0, 1.0, 1, -1);
   RNA_def_property_ui_text(prop,
                            "Remove Threshold",
-                           "Upper bound for a vertex's weight "
+                           "Upper (inclusive) bound for a vertex's weight "
                            "to be removed from the vgroup");
   RNA_def_property_update(prop, 0, "rna_Modifier_update");
 
diff --git a/source/blender/modifiers/intern/MOD_weightvg_util.cc b/source/blender/modifiers/intern/MOD_weightvg_util.cc
index da0db8db2f3..f9794b71d55 100644
--- a/source/blender/modifiers/intern/MOD_weightvg_util.cc
+++ b/source/blender/modifiers/intern/MOD_weightvg_util.cc
@@ -296,7 +296,7 @@ void weightvg_update_vg(MDeformVert *dvert,
 
     /* If the vertex is in this vgroup, remove it if needed, or just update it. */
     if (dw != nullptr) {
-      if (do_rem && w < rem_thresh) {
+      if (do_rem && w <= rem_thresh) {
         BKE_defvert_remove_group(dv, dw);
       }
       else {
@@ -304,7 +304,7 @@ void weightvg_update_vg(MDeformVert *dvert,
       }
     }
     /* Else, add it if needed! */
-    else if (do_add && w > add_thresh) {
+    else if (do_add && w >= add_thresh) {
       BKE_defvert_add_index_notest(dv, defgrp_idx, w);
     }
   }