The exception handling mechanism in the CLI Module in Huawei eSpace U1910, U1911, U1930, U1960, U1980, and U1981 unified gateways with software before V100R001C20SPH605 allows remote attackers to cause a denial of service (CLI outage) via crafted SSH packets.

An unspecified module in Huawei eSpace U1910, U1911, U1930, U1960, U1980, and U1981 unified gateways with software before V200R003C00SPC300 does not properly initialize memory when processing timeout messages, which allows remote attackers to cause a denial of service (out-of-bounds memory access and device restart) via unknown vectors.