diff --git a/.env.development b/.env.development
index 3bd0317..712c17b 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.511
+NEXT_PUBLIC_APP_VERSION=1.6.512
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 3924c8f..6b66e22 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.511
+NEXT_PUBLIC_APP_VERSION=1.6.512
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 413111f..b67d667 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.6.512] – 2025-07-01
+
+- fix: hide Firmware update button if admin not loged in
+
+---
 ## [1.6.511] – 2025-07-01
 
 - feat: alle KÜs Firmware update
diff --git a/components/main/settingsPageComponents/GeneralSettings.tsx b/components/main/settingsPageComponents/GeneralSettings.tsx
index d6a17a1..00626e3 100644
--- a/components/main/settingsPageComponents/GeneralSettings.tsx
+++ b/components/main/settingsPageComponents/GeneralSettings.tsx
@@ -200,7 +200,14 @@ const GeneralSettings: React.FC = () => {
             <button
               type="button"
               className="bg-littwin-blue text-white px-4 py-2 h-8 text-xs rounded whitespace-nowrap"
-              onClick={handleKueFirmwareUpdate}
+              onClick={() => {
+                const confirmed = window.confirm(
+                  "⚠️ Wollen Sie wirklich ein Firmwareupdate für alle KÜ-Module starten?"
+                );
+                if (confirmed) {
+                  handleKueFirmwareUpdate();
+                }
+              }}
             >
               Firmwareupdate alle KÜ-Module
             </button>
diff --git a/mocks/device-cgi-simulator/settings/kueFirmwareUpdateLog.json b/mocks/device-cgi-simulator/settings/kueFirmwareUpdateLog.json
index 882dc39..a837917 100644
--- a/mocks/device-cgi-simulator/settings/kueFirmwareUpdateLog.json
+++ b/mocks/device-cgi-simulator/settings/kueFirmwareUpdateLog.json
@@ -1,4 +1,14 @@
 [
+  {
+    "timestamp": "2025-07-01T05:48:51.161Z",
+    "command": "&KSU99=1",
+    "message": "Firmwareupdate an alle KÜ-Module ausgelöst (Mock)"
+  },
+  {
+    "timestamp": "2025-07-01T05:47:36.526Z",
+    "command": "&KSU99=1",
+    "message": "Firmwareupdate an alle KÜ-Module ausgelöst (Mock)"
+  },
   {
     "timestamp": "2025-06-30T13:30:18.185Z",
     "command": "&KSU99=1",
diff --git a/package-lock.json b/package-lock.json
index 0397db8..f48f819 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.511",
+  "version": "1.6.512",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.511",
+      "version": "1.6.512",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@iconify-icons/ri": "^1.2.10",
diff --git a/package.json b/package.json
index 0d2eae6..ec9f2ef 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.511",
+  "version": "1.6.512",
   "private": true,
   "scripts": {
     "dev": "next dev",