diff --git a/cni/network/network_windows.go b/cni/network/network_windows.go
index d839fa0175..615c871496 100644
--- a/cni/network/network_windows.go
+++ b/cni/network/network_windows.go
@@ -42,12 +42,16 @@ func handleConsecutiveAdd(args *cniSkel.CmdArgs, endpointId string, nwInfo *netw
 	hnsEndpoint, err := hcsshim.GetHNSEndpointByName(endpointId)
 	if hnsEndpoint != nil {
 		log.Printf("[net] Found existing endpoint through hcsshim: %+v", hnsEndpoint)
-		log.Printf("[net] Attaching ep %v to container %v", hnsEndpoint.Id, args.ContainerID)
-
-		err := hcsshim.HotAttachEndpoint(args.ContainerID, hnsEndpoint.Id)
-		if err != nil {
-			log.Printf("[cni-net] Failed to hot attach shared endpoint[%v] to container [%v], err:%v.", hnsEndpoint.Id, args.ContainerID, err)
-			return nil, err
+		endpoint, _ := hcsshim.GetHNSEndpointByID(hnsEndpoint.Id)
+		isAttached, _ := endpoint.IsAttached(args.ContainerID)
+		// Attach endpoint if it's not attached yet.
+		if !isAttached {
+			log.Printf("[net] Attaching ep %v to container %v", hnsEndpoint.Id, args.ContainerID)
+			err := hcsshim.HotAttachEndpoint(args.ContainerID, hnsEndpoint.Id)
+			if err != nil {
+				log.Printf("[cni-net] Failed to hot attach shared endpoint[%v] to container [%v], err:%v.", hnsEndpoint.Id, args.ContainerID, err)
+				return nil, err
+			}
 		}
 
 		// Populate result.