diff --git a/app/data/cumul_2025_by_week.json b/app/data/cumul_2025_by_week.json
new file mode 100644
index 0000000..db81756
--- /dev/null
+++ b/app/data/cumul_2025_by_week.json
@@ -0,0 +1 @@
+{"1": 319, "2": 321, "3": 339, "4": 352, "5": 359, "6": 380, "7": 388, "8": 477, "9": 521, "10": 581, "11": 598, "12": 648, "13": 674, "14": 681, "15": 710, "16": 776, "17": 810, "18": 835, "19": 850, "20": 851, "21": 864, "22": 868, "23": 872, "24": 873, "25": 878, "26": 879, "27": 882, "28": 882, "29": 882, "30": 882, "31": 882, "32": 882, "33": 882, "34": 882, "35": 883, "36": 883, "37": 883, "38": 886, "39": 887, "40": 888, "41": 888, "42": 893, "43": 898, "44": 910, "45": 915, "46": 915, "47": 924, "48": 929, "49": 934, "50": 943, "51": 956, "52": 956}
\ No newline at end of file
diff --git a/app/routers/audit_full.py b/app/routers/audit_full.py
index 1932369..634a2de 100644
--- a/app/routers/audit_full.py
+++ b/app/routers/audit_full.py
@@ -272,11 +272,25 @@ async def audit_full_patching(request: Request, db=Depends(get_db)):
         f" AND saf.{_latest}"
     )).fetchone()
 
-    # Comparaison Y-1
+    # Comparaison Y-1 a meme semaine
     compare = None
     from datetime import datetime as _dt
     current_week = _dt.now().isocalendar()[1]
     if year == 2026:
+        # Cumulatif 2025 a la meme semaine (pre-calcule)
+        import json as _json, os as _os
+        cumul_2025_path = _os.path.join(_os.path.dirname(_os.path.abspath(__file__)), "..", "data", "cumul_2025_by_week.json")
+        prev_at_same_week = 0
+        prev_total = 1045
+        prev_data_ok = False
+        try:
+            with open(cumul_2025_path) as f:
+                cumul_2025 = _json.load(f)
+            prev_at_same_week = cumul_2025.get(str(current_week - 1), cumul_2025.get(str(current_week), 0))
+            prev_data_ok = True
+        except Exception:
+            pass
+
         compare = db.execute(text(
             f"SELECT"
             f" COUNT(*) FILTER (WHERE patch_count_2026 >= 1) as current_patched,"
@@ -284,14 +298,15 @@ async def audit_full_patching(request: Request, db=Depends(get_db)):
             f" COUNT(*) as total"
             f" FROM server_audit_full WHERE status IN ('ok','partial') AND {_latest}"
         )).fetchone()
-    elif year == 2025:
-        compare = db.execute(text(
-            f"SELECT"
-            f" COUNT(*) FILTER (WHERE patch_count_2025 >= 1) as current_patched,"
-            f" 0 as prev_year_total,"
-            f" COUNT(*) as total"
-            f" FROM server_audit_full WHERE status IN ('ok','partial') AND {_latest}"
-        )).fetchone()
+        compare = {
+            "current_patched": compare.current_patched,
+            "current_total": compare.total,
+            "prev_year_total": compare.prev_year_total,
+            "prev_at_same_week": prev_at_same_week,
+            "prev_total": prev_total,
+            "prev_data_ok": prev_data_ok,
+            "compare_week": current_week - 1,
+        }
 
     patch_by_domain = db.execute(text(
         f"SELECT d.name as domain, d.code,"
diff --git a/app/templates/audit_full_patching.html b/app/templates/audit_full_patching.html
index 30e5ce5..89daba6 100644
--- a/app/templates/audit_full_patching.html
+++ b/app/templates/audit_full_patching.html
@@ -57,41 +57,49 @@
 
 <!-- Comparaison Y-1 -->
 {% if compare and year == 2026 %}
-{% set pct_current = (compare.current_patched / compare.total * 100)|int if compare.total > 0 else 0 %}
-{% set pct_prev = (compare.prev_year_total / compare.total * 100)|int if compare.total > 0 else 0 %}
-{% set diff = compare.current_patched - compare.prev_year_total %}
-{% set diff_pct = pct_current - pct_prev %}
+{% set pct_current = (compare.current_patched / compare.current_total * 100)|int if compare.current_total > 0 else 0 %}
+{% set pct_prev_same = (compare.prev_at_same_week / compare.prev_total * 100)|int if compare.prev_total > 0 else 0 %}
+{% set pct_prev_total = (compare.prev_year_total / compare.current_total * 100)|int if compare.current_total > 0 else 0 %}
+{% set diff_same = pct_current - pct_prev_same %}
 <div class="card p-3 mb-4">
-    <div class="text-xs text-gray-500 mb-2">Comparaison 2026 (S14) vs 2025 (année complète)</div>
+    <div class="text-xs text-gray-500 mb-2">
+        Comparaison à même semaine (S{{ compare.compare_week }})
+        {% if not compare.prev_data_ok %}<span class="text-cyber-yellow ml-2">Données 2025 incomplètes</span>{% endif %}
+    </div>
     <div style="display:flex;gap:12px;align-items:center;">
+        <!-- 2026 en cours -->
         <div style="flex:1;">
             <div class="flex justify-between text-xs mb-1">
-                <span class="text-cyber-accent font-bold">2026 (en cours)</span>
-                <span class="font-bold {% if pct_current >= 80 %}text-cyber-green{% elif pct_current >= 50 %}text-cyber-yellow{% else %}text-cyber-red{% endif %}">{{ compare.current_patched }} / {{ compare.total }} ({{ pct_current }}%)</span>
+                <span class="text-cyber-accent font-bold">2026 (S{{ compare.compare_week }})</span>
+                <span class="font-bold {% if pct_current >= 80 %}text-cyber-green{% elif pct_current >= 50 %}text-cyber-yellow{% else %}text-cyber-red{% endif %}">{{ compare.current_patched }} / {{ compare.current_total }} ({{ pct_current }}%)</span>
             </div>
             <div style="height:10px;background:#1f2937;border-radius:4px;overflow:hidden;">
                 <div style="height:100%;width:{{ pct_current }}%;background:#22c55e;border-radius:4px;"></div>
             </div>
         </div>
+        <!-- 2025 meme semaine -->
         <div style="flex:1;">
             <div class="flex justify-between text-xs mb-1">
-                <span class="text-gray-400">2025 (total)</span>
-                <span class="text-gray-400">{{ compare.prev_year_total }} / {{ compare.total }} ({{ pct_prev }}%)</span>
+                <span class="text-gray-400">2025 (S{{ compare.compare_week }})</span>
+                <span class="text-gray-400">{{ compare.prev_at_same_week }} / {{ compare.prev_total }} ({{ pct_prev_same }}%)</span>
             </div>
             <div style="height:10px;background:#1f2937;border-radius:4px;overflow:hidden;">
-                <div style="height:100%;width:{{ pct_prev }}%;background:#6b7280;border-radius:4px;"></div>
+                <div style="height:100%;width:{{ pct_prev_same }}%;background:#6b7280;border-radius:4px;"></div>
             </div>
         </div>
-        <div style="min-width:120px;text-align:center;">
-            <div class="text-lg font-bold {% if diff >= 0 %}text-cyber-green{% else %}text-cyber-red{% endif %}">
-                {% if diff >= 0 %}+{% endif %}{{ diff }}
+        <!-- Ecart -->
+        <div style="min-width:110px;text-align:center;">
+            <div class="text-lg font-bold {% if diff_same >= 0 %}text-cyber-green{% else %}text-cyber-red{% endif %}">
+                {% if diff_same >= 0 %}+{% endif %}{{ diff_same }} pts
             </div>
-            <div style="font-size:10px;" class="{% if diff_pct >= 0 %}text-cyber-green{% else %}text-cyber-red{% endif %}">
-                {% if diff_pct >= 0 %}+{% endif %}{{ diff_pct }} pts vs 2025
-            </div>
-            <div style="font-size:9px;" class="text-gray-600">S14 vs année complète</div>
+            <div style="font-size:10px;" class="text-gray-500">vs 2025 même semaine</div>
         </div>
     </div>
+    <!-- Ligne 2025 total -->
+    <div class="mt-2 flex justify-between text-xs text-gray-500">
+        <span>2025 année complète : {{ compare.prev_year_total }} patchés ({{ pct_prev_total }}%)</span>
+        <span>Objectif 2026 : dépasser {{ compare.prev_year_total }}</span>
+    </div>
 </div>
 {% endif %}