There is a use-after-free vulnerability in a Huawei product. A module cannot deal with specific operations in special scenarios. Attackers can exploit this vulnerability by performing malicious operations. This can cause memory use-after-free compromising normal service. Affected product include some versions of NIP6300 NIP6600 NIP6800 S1700 S2700 S5700 S6700 S7700 S9700 Secospace USG6300 Secospace USG6500 Secospace USG6600 and USG9500.