Some of the Huawei products have a vulnerability that can be exploited for denial of service attacks. Specifically, there is no protection against a certain protocol attack scenario, allowing unauthorized remote attackers to create scenarios that result in denial of service. The affected product versions include NIP6300 (V500R001C30, V500R001C60), NIP6600 (V500R001C30, V500R001C60), Secospace USG6300 (V500R001C30, V500R001C60), Secospace USG6500 (V500R001C30, V500R001C60), Secospace USG6600 (V500R001C30, V500R001C60), and USG9500 (V500R001C30, V500R001C60).