diff --git a/shared/src/main/java/com/openclaw/assistant/shared/utils/NetworkUtils.kt b/shared/src/main/java/com/openclaw/assistant/shared/utils/NetworkUtils.kt
index e7a07f8..7bcaf61 100644
--- a/shared/src/main/java/com/openclaw/assistant/shared/utils/NetworkUtils.kt
+++ b/shared/src/main/java/com/openclaw/assistant/shared/utils/NetworkUtils.kt
@@ -34,6 +34,10 @@ object NetworkUtils {
         if (ipv4Parts.size == 4) {
             val p1 = ipv4Parts[0].toIntOrNull() ?: return false
             val p2 = ipv4Parts[1].toIntOrNull() ?: return false
+            val p3 = ipv4Parts[2].toIntOrNull() ?: return false
+            val p4 = ipv4Parts[3].toIntOrNull() ?: return false
+
+            if (p1 !in 0..255 || p2 !in 0..255 || p3 !in 0..255 || p4 !in 0..255) return false
 
             if (p1 == 127) return true // Loopback: 127.x.x.x
             if (p1 == 10) return true  // Class A Private: 10.x.x.x